Design and Development

Complexity measures in design and development Albert Einstein once said Everything should be made as simple as possible, but no simpler. These simple words coming out of a geniuss mind carry a lot of meaning and depth in them. The last two decades saw an exponential rise in different branches of engineering and sciences; and with these developments came in a crowd of very advanced yet very complicated technologies. Are these complexities intended? The answer is very simple NO; the very word advanced is almost always inherited by complexity. No one would want to design and manufacture something very complex, but the more advanced a technology is, the more complex it gets. Even the works done by the man who said those words are far too complex for a common man; and actually that is exactly what he meant. Everyone tries to make things as simple as possible, but no simpler than that, they just cant and the simplest product design possible can become very complex in some regards. With increasing complexity, there is always a danger of system being destabilized, reduction in overall performance, higher cost, higher maintenance, etc. The way to keep control over complexity is to have measure of it, so that management and manufactures know what exactly to-do and how to change their operational strategy. In this dissertation I am presenting a detailed overview of complexity, its different meanings and interpretations in various industries and a host of measures that were developed to measure and evaluate complexity. There are also a few methods of minimizing complexity presented along with case studies illustrating the means in which these measures were applied to real-time manufacturing and designing processes. Complexity: What is complexity? could be one of the most complex questions tube answered. The very definition of complexity from dictionary would suggest the following: Consisting of interconnected or interwoven parts Composed of two or more units Offers great difficulty in understanding, solving, or explaining The interlacing of parts so as to make it nearly impossible to follow or grasp them separately Extreme complication and often disorder; complication and entanglement that make solution or understanding improbable The first two meanings are not too related to our present context so I will ignore them, but the rest suggest the exact meaning of what complexity is. As we can see, if I do not understand something properly or am not capable enough to understand it, that thing is complex tome. Does this mean it is really complex? The answer again is very simple, NO and that is the very reason why complexity is so hard to define. Complexity of anything is dependent on many factors and one very important factor is human understanding. A subject complex to me could be a piece of cake for someone else and this very behaviour of complexity makes it very hard to measure and evaluate it. An important and interesting question that may arise in readers minds, Does the very same meaning of complexity stand in industry standards too? The answer could be both a YES and a NO. It does stand the same thing in some cases, but in rest, the definition of complexity is completely modified. A best example would be industries involved in computer sciences and engineering. There complexity of a code does not really mean it is hard to understand, it rather means that it takes a lot of time for computer to calculate and give the results. In most of the mechanical and electronic designs, complexity would mean systems with multiple interacting parts, the behaviour of which cannot be related with respect to individual parts. That is their collectivebehavior is completely different and /or unpredictable from their individual behaviour. Again this unpredictability can be related to just the static structure of these components or dynamic nature, thus the differentiation between static complexity and dynamic complexity. Now Avery good question to answer is What exactly are these static and dynamic complexities? Static Complexity: Given a particular system (could be any system like manufacturing plant with different manual and automated equipment or just a small network with multiple servers/ clients ), there is always some complexity involved with the static structure of these components, could be just their physical shapes/ sizes or their alignment with other objects or with environment. This complexity which is made up as a function of various parameters like physical shapes, structures, connectivity, variety and strengths of components is called static complexity. Dynamic complexity: Dynamic complexity is more related towards the behaviour of these components as a unit. As mentioned earlier, the pattern of behaviour for a group of components is almost always different than the pattern for individual components; this behaviour measured over a period of time is a major parameter in dynamic complexity. A very important form of complexity that is normally taken as constant or zero while evaluating static or dynamic complexities is complexity arising because of control; that is, given a particular system, there could be many ways in which it can controlled and each one of these methods can result in a different static / dynamic complexity measure, thus to really evaluate a system, we should also consider this parameter and measure a control complexity too. But for most practical purposes, it is assumed that there is only one way to control, thus ignoring control complexity. Measuring and evaluating dynamic complexity is highly dependent on the industry and its specific design, thus forming generic measures for dynamic complexity is not only complicated but also inapplicable invest majority of other designs. Thus research is more focused towards static complexity and its measures. Though there are papers which concentrate only on dynamic complexity, they are very much oriented towards a specific industry and its related fields. Does this mean that static complexity is similar for all industries and designs? No, but a particular measure calculated for static complexity could be easily expanded to other designs too, which is not the same for dynamic complexity. In this paper, I will give measurements of both static and dynamic complexities with respect to manufacturing environment. Before we go any further into measurement of complexity, it is a good idea to understand why and how complexity arises in systems? There is general belief that complexity arises due to many random factors. It could be true in some sense, but that only indicates a very bad design. For systems which are well designed, manufactured and maintained, randomness is not a major factor; it is rather the fact that the system cannot be easily described which causes more complexity. According to Axelrod and Cohen describe systems as comprising of agents and artifacts. The artefacts are just physical (or virtual) objects that comprise the system where as the agents who have attributes like location, memory, ability to interact with other agents, ability to manipulate and change functions, control these objects. The agents may not have to be people alone; they can be computer programs, groups, political entities etc. that may affect the system directly or indirectly. Another important and very interesting concept of complexity comes from Wolfram, in which he states that complexity in a system comes from randomness produced because of three sources. The first source is the environment and its intervention, either directly or indirectly, on the system. The second source is the initial conditions that the system was in, before being used. These initial conditions could be random thus adding more weight to the complexity. The third and most important one is the internal or intrinsic complexity of the system. That is the complexity of the system when there is no external influence or affect. With all these different views of complexity, we are now ready to go ahead and describe what complexity in design is? But before that, let us see what exactly design means. Design and Why is it done? In this section, let us see what exactly design means and as in every case, let us start with the exact dictionary definition of design. To conceive or fashion in the mind; invent To formulate a plan for; devise To plan out in systematic, usually graphic form To create or contrive for a particular purpose or effect To have as a goal or purpose; intend To create or execute in an artistic or highly skilled manner These, may be with little twists here and there, are the exact definitions of Design that you see in dictionaries and they almost suggest what precisely designing means in industry standards. Basically designing involves making things better and more useful to customers (or people). Almost every single thing that we use is (/was)designed at some point of time; things that we take for granted were once designed and engineered. Design is an integral part of us and our society and is united in almost everything and anything we do and we use. Designing anything starts with an idea, any idea good or bad. The main job of designers is to reform this idea so that it is understandable for the people who need to work on it and manufacture it, sort of able print. Whether it is a multibillion dollar dam or a small fashion hair pin, the process of creating them is all the same and involves almost the same basic general steps. Before we discuss these steps, its important for us to understand why designing is done on the first place? Designing is a very important and basic step in any product. To deliver product, there are many steps involved. There are scientists who invent new technologies, engineers who use these technologies to develop various components, manufactures that use these components in manufacturing different products and finally marketers who take the prime role behind delivering the product. But who is going to coordinate their efforts to produce a desirable and successful product, no one else but the designers. They are the people who understand what the customer want and deliver a mechanism to make it happen. Designing is not just what we read in magazines which depict it as mostly involved with fashion industry. No that is not at all the case it involves a lot of insight into the way customer thinks and wants his product. As I mentioned earlier, everything that we use was designed at some point of time. There are some very important things that every design is supposed to follow, a brief list of which is as follows: User requirements: The very first and most important aspect designer has to consider is user. In this world where the number of competitors for a product is more than the product itself, there are very few designs which are being accepted into user community. The main reason behind their success being complete satisfaction of customers. The very first step of any design process is to know what exactly customers want? Creativity: Next comes creativity. When the designer knows what the customer wants, he has to create something new; he just cant give the same old stuff which just satisfies the needs. If I am buying a camera, being a picky customer I wouldnt buy any camera that can take a snap of me, NO, I want so many other things which may be I will not even dream of using, but still I want them in my camera. That is how customers think and that is what exactly designers provide. Innovation has to be there in a product without which there is no value to it.Designers explore all the different combinations in which a product can be designed and seek new methods in doing so. The stranger it is the better. Now that there are so many simulation tools and other devices that provide so much insight into the product even before it is made, this work is simplified a lot. Business process: the other very important consideration a designer has to go through is the business process both from company perspective and user perspective. The overall price of the product may depend on the design and considering this is a very important thing. The best examples are the products from Microsoft, take for example PowerPoint, though costing only 50-100 dollars, its overall revenue may be grater than some very big software companies whose products cost millions of dollars. Why? The design was so done that there are millions of satisfied customers to PowerPoint or excel who can afford it easily than to products that cost millions of dollars. Manufacturing overview: it is also very important for a designer tube thoroughly aware of what exactly his company is capable of and at what capacity. I can design a magnificent product in a technology that my company is not even aware of, there is no use to it. A designer should be completely knowledgeable in the manufacturing processes and principles of his company so that whatever he does is not counter tithe existing mechanism, but only increase its productivity by using it in a better way. Now that we considered the basic aspects of design, let us now look at the design process. Being a designer is not such a simple job, you will have to consider so many discrete and varied things, a small list of which was provided above. There is a lot of trial and error involved. Till you get the right one, there could be thousand rejected designs. Though most of the design process is done by designers, there is a lot of contribution from most of the other departments involved in getting that product out like manufacturing people, engineers, business analysts, managers etc. The following are the basic but general steps I mentioned earlier that any designer follows: Understanding and evaluating Requirements: The very first step involved in design process is to understand and evaluate the user requirements. This involves defining the objectives, setting deadlines, targets and parameters. The design team is involved right from the beginning to the end as they have to understand the business process both from the companys point of view and the customers point of view. The idea being creating an ideal project which will satisfy both the business processes and optimize them. A very important question to answer at this level is why are we creating / modifying this product? Once this question is properly answered, the rest of the process becomes simpler and logical. Research: Research is one of the most important aspects of the whole process. This is an ever going process, especially in the case of longer project. Research typically includes a variety of areas like Technology, Economy, User Satisfaction, Competitor products, trends, risks etc. Every one among them will affect the product and its design. A simple example would be the conversion from analogy to digital. May bee decade or two ago, there were some systems which were still concentrating on analogy devices. Now they are hardly seen. When such drastic change is happening (a decade would not be drastic for us, but for large scale manufacturing plants to change their whole technology from analogy to digital would cost millions of dollars even though it is spread over multiple years), it would be highly beneficial to a company to be well informed beforehand rather than changing at the spur of moment. Research is more concentrated on the customer / user than anything else. Whatever user wants has to be done and it would be much more preferable to know the user choices beforehand doing our own research, rather than getting a dissatisfied comment from him. Planning: planning is another significant part of the whole process. As I mentioned earlier, it is always good for t he designers to know the internal business processes of the company beforehand rather than knowing them later on and trying to modify the design. Planning takes care of this step. With participation from wide variety of areas all across the board, it becomes simpler for the designer to know and understand different views and angles about a manufacturing process so that the overall design is acceptable and enjoyable by everyone. Communication: In a business process, there are always instances when the customer thinks of something, the designer understand something else and the manufacturing guys create something completely different. Why does this happen? Lack of communication. Whose mistake is this? Nobodys. It is very important for a designer and his team to keep inconstant touch with both the customers and the manufacturing guys at the same time. Designers are the only bridge between customers and manufacturers and they should be completely aware of the business process from bot h the sides. It is clients responsibility that he conveys the proper requirements to the designers so that they care-convey them to their manufacturing guys, a small leak here and there can result in disaster. But does the client do this always? NO. So it becomes an additional burden on the designer to keep in constant touch with the customer and keep him posted of what is going on with the product, so that if there is some discrepancy, then the message is obtained instantly, same is the case with manufacturing people. Implementation: the last step is implementation, mostly done by the manufacturing people but involves a little contribution from design team too. First of all, they may have to monitor the whole process and may be even test it thoroughly. Being the only people with complete knowledge of clients business requirements, they are also responsible for quality. This is how a generic design process goes, let me stress the word generic again. Depending on industry, this process may change here and there, but the changes would be nominal. Now let us consider the different contexts of complexity in different industries and their detailed analysis, the major difference between the following topic and the one presented earlier being that the following one is description of complexity from design perspective. Different Contexts of complexity in different industries: I already mentioned while explaining the definition of complexity that its basic meaning may change from industry to industry. In this section let me highlight some key industries and illustrate the meaning of complexity with respect to that particular industry. In the very same process let us also try to combine the design process into the contexts that we can start concentrating more on complexity in design more than complexity in general. Let us start with the software industry where the definition of complexity is very fundamental but very useful. Complexity in Design for Software industries: What exactly does complexity in software design mean? IEEE standard 729gives the following definition for complexity in software, The degree of complication of a system or system component, determined by such factors as the number and intricacy of interfaces, the number and intricacy of conditional branches, the degree of nesting, the types of data structures, and other system characteristics. Though very extensive, this definition still doesnt cover all the aspects ofcompelxity in software. There are many things to be considered while stating complexity in software a few of which are the operating system, programming language , database, interface being used etc. and etc. Now popular question could be, Does all this matter, a complexity has tube related to the way you design an algorithm more than the way you program it?. Actually it does. There is a popular notion of measuring complexity in software industry where in they compare a particular language (for example) with another one and decide what is more complex. Though theoretically perfect, practically this is totally wrong. How can one compare an algorithm written in Java to the same algorithm written in C, their applications and usages are completely different. Similarly you cannot compare a program using Oracle as its database to a program using Microsoft Access. Now can we measure complexity taking all these into consideration? Not really. For measurement purposes again everything falls back to algorithm level. Whatever be the programming basis you are using, underneath it there is only a single algorithm being used. Thus in this context measurmentof complexity has to be done with a lot of risk. Later in the dissertation Aim going to suggest some popular methods of complexity measurements used in software industry. In general, complexity in software comprises mainly of the following components (apart from the algorithm): Component Reuse (so called Object Oriented Programming): This is Avery important component of complexity measurement these days. Given a particular algorithm, if you can reuse a piece of code again and again, thus avoiding redundancy, the complexity would decrease by a lot. Hence this factor is a very important component of software complexity. Control Flow: This takes into consideration the whole control structure of the program. Data Structures: The number of data structures being used and their size (in bits and bytes) Size: the overall length of the code (also including the commented lines and documentation as even they are considered in compilation process) From the above description, we can conclude that software complexity depends a lot on the algorithm being used, but many other factors contribute a lot too. Thus a good designer would first of all consider the algorithm and once the algorithm is decided, he / she would spend more time looking into various other considerations, trying to decrease the length of code, number of hits to the database, number of requests from the server etc. Complexity in Manufacturing: Let me clarify what I mean by Manufacturing before I go any further, it includes almost every single sector of consumer product industry starting from auto industry to small electronic components. Why am I including them of all into a single concept? Because the way they function is almost similar with the difference in size. Thus in this section, I will try to distinguish them whenever necessary, but otherwise they are all the same. Majority of these industries involve many moving parts and each one of these parts are again designed and manufactured, either in the same company of in a different one. Thus there is complexity involved in designing each one of them, and then comes the complexity of assembling them into one single system, normally carried out by various automated and / or manual methods. Consider for example an auto industry. With thousands of components going into the assembly line, the whole process becomes highly complex; similar is a case with electronic devices wherein minute parts has to placed and soldered on a PCB with utmost precision. Normally complexity of a manufacturing process is dependent on many parameters, a brief list of which is as follows: Similarity in processing requirements: the complexity of manufacturing process is highly dependent on the processing requirements and their similarity. Any process would be much simpler when it has similar methods being used across various modules. Thus with variance in processing requirements, the complexity increases. Complexity also increases due to changing consumer demand, which directly affects the whole setup. Yield: Manufacturing yield is another important factor that determines the complexity. There is always a constant effort to increase the yield but without proper planning and automation, this could result in huge complexities. Miniaturization: With the latest trend of miniaturization, all the components are being made as small as possible thus increasing their overall complexity. We can easily say that a laptop or as a matter of fact a palm top is much more complex than a desktop. A similar trend is being observed in many of the electronic sectors and thus enhancing the complexity of design. Energy Efficiency: More applicable in automobile than anywhere else, this parameter is affecting the complexity a lot. With modern vehicles(hybrid electrical and gasoline based engines), the energy efficiency is being increased a lot, but along with it, the complexity is also increasing at a similar rate. Why do we need Complexity Measures? Till now I discussed the basic definitions and detailed meanings of complexity and design. Now let me consider on measurement of complexity. The very first question to be answered in this regard is, Why do we need complexity Measures for? The answer for this question cannot be given in all technical fashion; we need some philosophy for this. As can be seen from the trends in the past two decades, the population is rising at a huge rate and along with it the technology is improving at an exponential rate. We are living in the period where Moores law is still being maintained and the devices that we use daily are being made more and more sophisticated and user friendly. But what if someone wants to understand the concepts behind any of these devices, though the modern communication is fast and very knowledgeable, it is vast too. Most of the information provided is random, not relevant, redundant and sometime inaccurate. This provides more confusion than clarity. As Simon says in his paper Creativity, Innovation, and Quality, Today, complexity is a word that is much in fashion. We have learned very well that many of the systems that we are trying to deal with in our contemporary science and engineering are very complex indeed. They are so complex that it is not obvious that the powerful tricks and procedures that served us for four centuries or more in the development of modern science and engineering will enable us to understand and deal with them. We are learning that we need a science of complex systems, and we are beginning to construct it, it is becoming more and more painful for common men to understand or evaluate systems because of their com plexity. This complexity is increasing day by day rather than taking a downward step. Not only in manufacturing processes but also in other industries like software, electronics, even social, political, religious, medical, biological hectare also vastly affected. The only way out of this confusion is to do proper designing so as to minimize the complexity involved, (note the work minimize. It is impossible to eliminate complexity). Are these the only reasons of measuring complexity? No way. None of the industrialists would ever invest in research for complexity measures for the above mentioned reasons. There is a huge economic advantage by doing proper complexity measurement and then taking proper steps to minimize it. I will mention a small list of these benefits here, and then explain them in detail as we go on to subsequent sections. List of advantages for measuring, evaluating and finally minimizing complexity from financial point of view: The operational strategy could be improved a lot. Processing speed and thus information transfer is much faster and smoother. System performance is better. Increased autonomy. More customer satisfaction and thus higher profit. Easier to maintain, modify or redesign. Statistics involved in Complexity measurement: Before we can go ahead and derive some formulae for complexity measures, it is a good idea to brush up some basic concepts of information theory and other related statistical engineering subjects. So this section is dedicated for a brief overview of some of these important concepts. Ensemble: An ensemble X is a random variable x with a set of possible outcomes, Vex = {v1,v2,..vi, VI), having probabilities {p1,p2,pi,..pie} with P(x=vi)=pi, pi 0 and Conditional Probability: Product rule: Sum rule: Bayes Theorem: Stationary Process: A random process where the various statistical qualities or properties do not vary with time is called a stationary random process. That is for a stationary process, the parameters like Mean, Variance, Standard Deviation etc. are constant across time.(Example White Noise) Erotic Process: Random process in which the time series produced are the same in statistical properties. That is a set of random processes are considered as time shifts of an original stationary process. Entropy: A very popular term in Information Theory, entropy means the lowest amount of bit rate needed for representing a particular symbol. The exact value of Entropy is . It is also called as uncertainty of x. With this definition of Entropy and following the probability rules defined earlier, joint and conditional entropies can be defined as follows: Joint Entropy: Conditional Entropy: This information should be sufficient for us to go ahead and derive our formulae; if anything is needed I will provide it at that instant. Different methods of Complexity Measures, their Evaluation and Analysis: As indicated above, different industries use the term Complexity indifferent aspects, thus there are varied meanings and definitions of it. With so many differences involved in just defining complexity, we can imagine how difficult it would be to measure and find methods to reduce complexity for all these manufacturing units. Taking into consideration this vastness, normally research is done only in those fields where there is some sort of existing mathematical background, using which new complexity measures and evaluations can be done. Ones these are formed, then the same measures could be used for relating complexity of any related industry. A popular area where there is a lot of mathematical background existing is algorithmic complexity, mostly for software related industries but applied in general to a vast area of other industries too. For beginners, let me start with describing few methods in software industry and we shall proceed to manufacturing plants later on. Fan-In Fan-out complexity: One of the most basic complexity formulae to be derived is Fan-Infant-Out complexity formed by Sallie Henry and Dennis kauri. Let us define the following parameters, L = length of the code in lines Fanon = the number of functions that call a particular function Fan-out= how many functions are called by a given function is calledfanout. Then the complexity of the code by this method is given as Complexity = L* (Fanon*Fan-out)2 In overall essence what exactly this formula does is, it counts the number of data counts from a particular unit of code and number of data counts into that unit or into a data structure to measure the complexity. Not so useful in real time applications with millions of lines of code and very complex algorithms. Software Science: This method was started by Maurice H. Halstead. Again this is a very simple and quite useless sort of algorithm to calculate complexity of program code. The formula for complexity that Halstead proposed was as follows: N=n1logn1 + n2logn2 Where N is the implementation length of the code, n1 is the number of unique distinct operators appearing in the implementation, n2 is the number of unique distinct operands appearing in the implementation. Now he defines the program volume as V =N log(n1 + n2) Where log is logarithm to the base of 2. Then he suggests that more the volume of the program code, more complexity is. As I said the above two measures were quite useless for modern programs involving very complicated algorithms. McCabes Cyclamate Complexity: To measure the amount of decision logic that is loops like for loop, while loop etc. or breaks like if, case etc., for a simple software module, we can use McCabes Cyclamate Complexity. An example formula that suggests the implementation of this principle is as follows: CC(G) = NE NN +1 Where CC is cyclamate complexity, NE is the number of edges in a given graph G, NN is the number of nodes in a given graph G and G is the graph. As we have seen much about complexity and its measures in software industry, let us also try to evaluate some measures in manufacturing industry. With the vastness of this field, there was a lot of research done in measuring, evaluation and minimizing complexity. There are some very basic but highly applicable formulae in which complexity could be measure and there are some derivations which involve high level of mathematics and statistics. Let me consider a case in which the measures real simple and then go to higher ones. The following is complexity measure that could be used for small systems with very less intermingling. If I have a simple system with the following information about it, the overall number of functions that the product provide is f the number of parts used in the product are Nap the number of types of parts involved in the product are Not the total number of interfaces involved in connecting these various parts is Ni Then complexity C of the system could be found by C = 1/f * (Nanny)1/3 As we can see from the above formula, it is quite simple but highly useful for a rough measurement of complexity. Now let us see some real complexity measures found in literary that consider modern day manufacturing standards. The following is a complexity measurement scheme proposed by Abhijit V. Deshmukh, Joseph J. Talavage and Moshe M.Barash. The paper was dedicated towards deriving complexity measures for static complexity. Without mentioning the whole derivation process, it is kind of incomplete to just mention the formula so I am trying to explain a small descriptive part of the whole process, not dealing much with the mathematical part. For a detailed derivation, please refer to the paper mentioned in references. Static Complexity and its Measurement: The static complexity as defined earlier is mostly concentrated on the static structure of the whole system, that is the variety of sub-systems, the strengths of interactions etc. There is a lot of chain wise dependencies in this concept like the manufacturing system being dependent on the part flow, in turn part flow being dependent on the type of parts being produced and the type of material handling devicesetc. Before deriving any complexity measure, a predefined set of constraints is specified so as to minimize an erroneous measurement. In this case the following characteristics of static complexity were defined by the authors: Factors resulting in Static Complexity: When there is more than one part type being produced in a single production run, it results in static complexity. Whenever there is a necessity for each part type to do multiple operations, that is a similar, tool being used for producing products from raw materials. Each operation, for a given part type, having multiple machine or processor options. When there is no precedence constraints defined for set of operations that is operations are done more randomly than in a predefined order. Thus every static complexity measure should always be able to capture effect of above mentioned factors and various combinations of them. More over any complexity measure should also follows the following conditions: The value of static complexity should always increase with increase in number of machine parts, part types, machines and the number of operations required to process one part mix. When the sequence flexibility for the parts in the production batch increase, the corresponding static complexity should also increase. When multiple parts are sharing same resources, static complexity should always increase. The complexity should remain constant when the original part mix is split into groups (either two or more.) With these factors and constraints defined, a derivation for the measure of static complexity was done and evaluated. For a detailed description of derivation and evaluation, please refer to Complexity in Manufacturing Systems, Part1: Analysis of Static Complexity byAbhijit V. Deshmukh, Joseph J. Talavage and Moshe M. Brash. But in short the overall equation of static complexity can be written as (Derived from [] , a brief overview of this derivation is presented in the next section, Dynamic Complexity) Where M is the number of subsystems, and N is the number of mutually exclusive states of the system with probabilities pig. As can be seen, the overall equation is merely a joint entropy calculation of these two combinations. It can be also mentioned in a much broader sense as Which takes into consideration, Systems, subsystem, part types and processing times. Thus with the derived model, author rather surprisingly summarizes that with increase in static complexity, the overall system performance increases. Derivation and Evaluation of Dynamic Complexity: In their paper Measuring complexity as an aid to developing operational strategy, authors G. Frizzle and E. Woodcock define and derive formulae for measuring both dynamic and static complexities. Taking into consideration the complexity measures in algorithm design, they derived the formulae for manufacturing process. As the whole concept is based upon Information theory and Network theory, it would be a good idea for the reader to go through those concepts before following their derivation. In the following section, I will state the formula and give a small illustration of its application in industrial process, a brief overview of derivation is also considered but with the assumption that the reader is an expert in the above mentioned fields, no effort was made to define some of the properties used as they are out of reach for the present topic. If we can consider the manufacturing process as a system with some inputs and an output, and if we can consider the number of items present at any point of time as the states of the system, then the whole system can be viewed in the form of a queue. If the process is considered stationary for simplicity purposes, then the average of inputs should be equal to the output. Let us imagine that the maximum capacity of the system is and the current usage is (where ), then because of the erotic property ( definition of erotic process is repeated here for convenience: Random process in which the time series produced are the same in statistical properties. That is asset of random processes are considered as time shifts of an original stationary process. ), the probability that the process is completely occupied is / . Now if we can get all these equations into a GD(Geometric Distribution), and evaluate the results for maximum entropy, then we get the maximum entropy for the process when t he probability of items being present at an instant of time is (Equation 1) Now anyone aware of network theory and probability theory, can recognize the above equation as the formula for simple queue with Poisson arrivals and with an arrival rate of and an exponentially distributed service rate of .. With this probability the entropy of the system could be derived to be (Equation 2) (The derivation of the above equation is simple substitution of the above mentioned probabilities into the entropy equation defined earlier.) The logarithms are taken for base two for all the generic purposes(that is the states are considered to be either off or on at any point of time and no transitions are allowed. This is similar to the most information theory derivations where the bits are considered to be either 0s or 1s.) the above two equations carry a lot of weight and meaning with them and I will cover them later on, but first of all lotus try to complete the derivation process without breaking the flow. Now if we can consider the above mentioned entropy as the upper limit, we can split into two parts, one for the tolerated states and one for on-tolerated states. Now if we can also split the programmable parts from the non-programmable parts (considered to be Bernoulli type processes), then we can derive the following equations, Where is the overall entropy of the system is, is the entropy of the tolerated states and is the entropy for non-tolerated states. If we can consider P as the probability of the system under consideration, then We can replace with the following equation and Where Pp. are the probabilities of queues for varying length, pm are the probabilities of having a queue of one or zero, pub are the probabilities of Bernoulli states Thus getting the final equation for entropy as (equation 3). Refer paper [] for more detailed overview of derivation process. The above formula represents the dynamic probability of the whole system. Now the afore mentioned formula for static probability can be derived from equation 3, by substituting P=0, pub =0, pp.=0 and take a limit of infinity on time. This gives the equation for static complexity as Effects of Complexity Measures on Production activities: Now that we explained some measures for complexity, let us also try to describe their effects on production environment and operational strategies. Let us start with equation 1 and equation 2 and try to find out what exactly they signify. The equations are mentioned here for users convenience, (Equation 1) (Equation 2) Though not really exactly a complexity measure, the above two equation signify a lot to us. The very fact that equation 1, which is an exact representation of a Poisson based queue, which is used a lot in network theory for representing Markov Processes, means a lot. The whole production system can be now seen as a Poisson queue or as a Markov Process with finite arrival rates and service rates. Now considering the upper limit of complexity, defined in equation 2, we can find out that as approaches , that is as the request rate is coming closer to service rate, the complexity of the overall process increases. This Isa very good explanation of higher complexities in busier environments. Thus it forms a very good basis for knowing what service rate is optimum for controlling complexity and thus finding a good operational strategy. Just considering the upper limits of entropy gave us so much information about the complexity of the overall system, so we can now imagine how much more information can be obtained from going into intricacies of the above equation. A simple example would be to consider both the static and dynamic complexities individually or as a combination for evaluating the operational strategy. If we consider the tolerated states and non-tolerated states, it can be seen that by increasing the control over the system (that is by increasing the value of P which represents the probability of the overall system), the value of entropy thus the value of complexity decrease. But this does not impact the non-programmable states of the system; that is, instead of trying to remove the complexity, we are just taking it to a state where we are in control of the system. Indirectly speaking it is something like having a complex system, but we exactly know what it is going to-do at what point of time. To minimize the complexity, we can take a different approach wherein we are going to directly working on the non-tolerable states too. Both programmable and non-programmable states can be controlled using proper tools so that the overall system complexity is reduced. The above discussion was only in the field of manufacturing, now if we consider the software industry too, complexity is directly related tithe performance, stability, reliability, maintainability and other abilities of the system. The higher the complexity, the greater is the chance of finding bugs in both performance and functionality. The only big problem with software industry is that there is no proper mechanism for finding complexity of a code. The methods which I mentioned could be used, but they are not really so through. If I was a software manager, I wouldnt really worry about the complexity measures given by some of these tools, no one would. Now that we have seen some major ways in which complexity could be used in deciding operational strategy, let us also consider methods in which complexity could be reduced in manufacturing process so as to obtain better results. Methods of controlling complexity: In the above discussion, I mentioned some means by which complexity could be controlled or minimized. Let me state some more means in a more detailed tone. In sections covering introduction and definitions of complexity, I mentioned again and again about the causes of complexity and the means in which complexity sneaks into the system. Even though the technology we use for manufacturing process is the biggest cause, there are many minute things which if we control and doing a proper fashion; a large part of complexity could be eliminated. There is also some research done in this regard by many researchers to find the means by which project complexity could be minimized thus leading towards a faster performance and greater quality. The following are some of the key points taken from these research papers: Formalization: Though directly unrelated to the complexity of a project, formalizing a project always helps in getting a better product. The more formalized a product is, the less is the probability of small mistakes. Improved Communication: Communication between team members from beginning to the end of the product is one of the most important concepts of minimizing design and manufacturing complexities. By improving communication and interaction, there is not only a chance of improving the design on the first place (as more heads are involved)but also the misconception and misrepresentations of the design process are totally eliminated, thus minimizing or completely removing the probability of complexity due to human understanding. Leadership Style: there is always a requirement for a strong leader to lead the group and communicate its developments to both the higher management and also the customers. A strong leadership always changes the course of product design and delivery . In their paper Project complexity and Efforts to Reduce product Development cycle time, authors Thomas B. Clift and Mark B. Vandenbosh, suggest two propositions about strong leadership. (I) The shorter the cycle time, the greater the requirement for an authoritarian leadership style and(ii) The more complex the project, the greater the requirement for participative leadership style Customer Involvement: one of the main causes of increase in complexity is irregular communication with customer. After all customers are the final users of the product and it is also their responsibility to mention what exactly they expect from a product. If it is a general product applicable to wide section of community, then it is the responsibility of the design team to do research and find out the customer requirements and covey them to the manufacturing team. The above are some non-technical, management oriented means of reducing complexity, are there any technical design oriented methods? There definitely are, some of which are discussed in the earlier sections. The process is simple, take a complexity measure applicable to your industry and try to minimize it using various means. A more research oriented approach is given in some of the literary papers attached in the references section. After considering the means of minimizing complexity, it would be great idea to consider a couple of case studies where complexity measures were used to change design process. As explained earlier, I am going to concentrate more on manufacturing fields rather than software or other industries as that is where most of the research on complexity and its applications are seen. Case Studies: Almost every single paper about complexity measures lists about three case studies where in the complexity of a system was reduced by the application of their measure and changing the operational strategy accordingly. In the following few lines, I will try to enlist case studies from varied areas so that a much broader outlook is obtained. Case Study 1: Let me first consider a very interesting case study described in Measuring complexity as an aid to developing operational strategy by. Frizzle and E. Woodcock, a brief description of their measurement process was given in Dynamic complexity section. They applied their measure on a machine shop consisting of 35 processes, 59 machines and an overall part number of 350 (kind of a small to medium scaled industry, which is the usual case). In their measurements of complexity, they found out that the overall static complexity was around 96.4 pep, where pep is a unit they use for measuring complexity. pep stands for equivalent product process. The dynamic complexity is around 160 pep, with programmable part contributing 78.4epp. The interesting part to note is that dynamic complexity is very high compared to static complexity, which suggests major flaw in the design and implementation process. When they evaluated the complexities coming from various sources, they found out that the programmable states like volatile mix, batching etccontributed a lot to this spike in the complexity, thus creating bottleneck. There were also issues found with queue stability. Thus fixing these, the dynamic complexity was minimized by a great deal and the process was improved a lot. There are two more very interesting trials mentioned in the same paper, which the user may find useful to go through. Case Study 2: Another very though provoking study of design is given in Harnessing Complexity in Design by Timothy T. Maxwell and M. Manic. Though they dont deal with complexity measures as such, they use many means by which the design process could be modified so as to produce a better design with lesser complexity. As I mentioned some of these measures in the discussion earlier, I thought it would be more interesting to illustrate their application in reality, thus the study of this case. In this paper, they applied their principles in designing a Fuel cell powered sport utility vehicle (SUV), a project done in Texas Tech University (TTU). In most of the case study, a detailed description of design process like team effort, organizing and formalizing the team, constant communication, understanding of basic objectives, requirements, constraints, etc. were discussed. After these basics were covered and put in place, a detailed design perspective was presented, with various systems, sub-systems, their hierarchical nature and interactions. These interactions and hierarchies, if properly designed and developed, would minimize the complexity by a lot. That is what was exactly done thus harnessing the complexity. Though very simple and fundamental, this discussion provides a deep insight into how complexity could be harnessed without involvement of high level mathematics and I strongly suggest the reader to go through the whole discussion. Conclusion: In the above discussion, I presented what the exact definitions of complexity and design are along with a detailed description of their inner meanings applied to various industries. Along with that, there were a host of complexity measures and evaluations presented applicable to a wide variety of industrial applications. Using these schemes to measure complexity and thus obtaining a means of modifying operational strategy is a very useful but tricky process. The user should go through multiple ways of measuring complexity and exactly evaluate the process that best fits his / her industry. Along with measuring complexity, it is also very useful to go through some organizational changes which not only improve the design and development process, but also boost the morale of manufactures and also customers thus leading towards a more successful and profitable product. Future Research: As can be seen from the above discussion, complexity measures are Avery important tool in deciding the strategy of operation and evaluate the fitness of a design / development process. But there are very few fields in which a perfect working complexity measure is found. It would be highly useful for industrialists to sponsor a wide variety of research activities in various fields of manufacturing and designing to find the inlaid complexities and measure them. In this section I will try to list of few of those fields where in complexity measures could be researched and formed. Generalization: The research found till now, is done specific to a particular industrial standard. It is always useful to have some measure that can be freely applied to wide varieties of fields. Thus generalizing the existing measures to multiple areas would be a great thing to accomplish. Complexity involved in Supply Chain: The measures till now are mostly applied to various parts involved in the design and manufacturing mechanism, but no one considers the parts that are obtained from third-party vendors as a different set of entities. A simple example would be auto industry where one of the most important parts of the whole design process is supply chain management. I believe that there should be complexity measures for these processes too and they should be integrated to complexity measure of the overall mechanism. Complexity for Software: there is a ton of research going on in the field of software engineering to define and evaluate the complexity of programs. I think generalization is also strongly needed in this field. A particular tool used for measuring complexity of a code written intone language is not applicable to other language, or gives a complexity erroneous result. This should be eliminated. References: [1] Axelrod, Robert and Michael Cohen, 1999, Harnessing Complexity, The Free Press, New York. [2] Simon, A. H., 1999, The Sciences of the Artificial, Third Edition, The MIT Press, Cambridge, Massachusetts. [3] Pesky, P. E., 1997, Creativity, Innovation, and Quality, ASQ Quality Press, Milwaukee, Wisconsin. Simon, A. H., 2000. [4] Warfield, J. N., 1994, A Science of Generic Design: Managing Complexity Through Systems Design, Iowa State University Press, Ames, Iowa. [5] Timothy T. Maxwell, M. M. Tank, Harnessing Complexity in Design. 2002 Society for Design and Process Science [6] Jeff Tina, Marvin V. Zelkowitz, Complexity Measure Evaluation and Selection IEEE Transactions on Software Engineering. 1995. [7] Michael Goldwasser, Jean-Claude Lacombe, Rajeev Motswana, Complexity Measures for Assembly Sequences. IEEE International conference on Robotics and Automation. 1996 [8] Thomas B. Clift, Mark B. Vandenbosh, Project Complexity and Efforts to Reduce Product Development cycle Time [9] Morgan Swank, Dingdong Zing, NPD Complexity and Technology Novelty as Antecedents of Design- manufacturing Integration: Effects of Product Design quality [10] Mike Hob day, Product complexity, innovation and industrial organization [11] Abhijit V. Deshmukh, Joseph J Talavage, Moshe M. Brash, Complexity in manufacturing systems Part1: Analysis of Static complexity [12] G. Frizzle, Woodcock, Measuring complexity as an aid to developing operational Strategy

University of Bridgeport Acceptance Rate, SAT/ACT Scores, GPA

The University of Bridgeport is a private, career-oriented university with an acceptance rate of 57%. Founded in 1927, the universitys 56-acre campus sits on the Long Island Sound in Bridgeport, Connecticut. The University of Bridgeport offers associate, bachelors, masters, and doctoral degree programs in professional fields. UB has more than 40 undergraduate programs, and academics are supported by a 16-to-1 student / faculty ratio and an average class size of 17. On the student life front, the University of Bridgeport offers about 50 student clubs and organizations. In athletics, the University of Bridgeport Purple Knights compete in the NCAA Division II East Coast Conference and the East Coast Athletic Conference. Considering applying to the University of Bridgeport? Here are the admissions statistics you should know, including average SAT/ACT scores and GPAs of admitted students. Acceptance Rate During the 2017-18 admissions cycle, the University of Bridgeport had an acceptance rate of 57%. This means that for every 100 students who applied, 57 students were admitted, making University of Bridgeports admissions process competitive. Admissions Statistics (2017-18) Number of Applicants 7,404 Percent Admitted 57% Percent Admitted Who Enrolled (Yield) 12% SAT Scores and Requirements The University of Bridgeport has a test-optional standardized testing policy. Applicants to UB may submit SAT or ACT scores to the school, but they are not required.  During the 2017-18 admissions cycle, 95% of admitted students submitted SAT scores. SAT Range (Admitted Students) Section 25th Percentile 75th Percentile ERW 460 550 Math 440 540 ERW=Evidence-Based Reading and Writing This admissions data tells us that of those who submitted scores during the 2017-18 admissions cycle, most of  University of Bridgeports admitted students fall within the  bottom 29% nationally  on the SAT. For the evidence-based reading and writing section, 50% of students admitted to UB scored between 460 and 550, while 25% scored below 460 and 25% scored above 550. On the math section, 50% of admitted students scored between 440 and 540, while 25% scored below 440 and 25% scored above 540. While the SAT is not required, this data tells us that a composite SAT score of 1090 or higher is competitive for the University of Bridgeport. Requirements The University of Bridgeport is test-optional except for a few specialized programs. Note that students applying test-optional to UB are required to submit a personal essay. For students who choose to submit scores, note that the University of Bridgeport participates in the scorechoice program, meaning that the admissions office will consider your highest score from each individual section across all SAT test dates. UB does not require the essay section of the SAT. ACT Scores and Requirements The University of Bridgeport has a test-optional standardized testing policy. Applicants to UB may submit SAT or ACT scores to the school, but they are not required.  During the 2017-18 admissions cycle, 7% of admitted students submitted ACT scores. ACT Range (Admitted Students) Section 25th Percentile 75th Percentile English 14 23 Math 16 25 Composite 16 23 This admissions data tells us that of those who submitted scores during the 2017-18 admissions cycle, most of University of Bridgeports admitted students fall within the  bottom 27% nationally  on the ACT. The middle 50% of students admitted to UB received a composite ACT score between 16 and 23, while 25% scored above 23 and 25% scored below 16. Requirements The University of Bridgeport is test-optional except for a few specialized programs. Note that students applying test-optional to UB are required to submit a personal essay. For students who choose to submit scores, note that University of Bridgeport does not superscore ACT results; your highest composite ACT score will be considered. UB does not require the optional writing section of the ACT. GPA In 2018, the average high school GPA of University of Bridgeports incoming freshmen class was 3.04. This data suggests that most successful applicants to the University of Bridgeport have primarily B grades. Admissions Chances The University of Bridgeport, which accepts over half of applicants, has a competitive admissions process. However, UB also has a  holistic admissions process and is test optional, and admissions decisions are based on more than numbers. A strong application essay and a glowing letter of recommendation can strengthen your application, as can participation in meaningful  extracurricular activities  and a rigorous course schedule. Applicants are encouraged to send additional recommendations, resumes, or other documentation to support their application. Students with particularly compelling stories or achievements can still receive serious consideration even if their grades and test scores are outside University of Bridgeports average range. Note that applicants to Bridgeports programs in nursing, dental hygiene, music, interior design, graphic design, and industrial design have additional admission requirements. If You Like University of Bridgeport, You May Also Like These Schools: University at AlbanyBinghamton UniversityUniversity of New HavenQuinnipiac UniversityFordham UniversityUniversity of ConnecticutAdelphi UniversitySouthern Connecticut State University All admissions data has been sourced from the National Center for Education Statistics and University of Bridgeport Undergraduate Admissions Office.

Essay on A Few Good Men Clip Analysis - 1143 Words

Hundreds of movies are released every year. Filmmakers try to create the next jaw-dropping movie that audiences will stand in line for hours and pay top dollar to see. The key to success is finding ideas that appeal to a mass audience. Viewers are the lifeline of any production company so making something for everyone is a savvy business move for the film industry. To cover all bases, there are over fourteen different genres of movies. Film making is not a solo effort. It is a collaboration between the actors, directors, producers and other key contributors. This combined effort or mise-en-scene includes all the elements of the film to include actors, backdrops, costumes, props and lighting used to meet the director’s vision†¦show more content†¦Although Mr. Reiner never served in the military, he was able to put his personal spin on this story because he related with Lt Kaffee. According to Weinraub (1992), â€Å"In all my films, said Mr. Reiner, who had stru ggled for years to move out of the shadow of his own father, the writer and director Carl Reiner, Ive got to find something I can hook up with, connect with. Kaffee is in the same business as his father; Im in the same business as mine† (pg.1). He used this familiar ground along with the moral dilemma as the foundation for the Oscar nominated movie. Mr. Reiner then turned his vision to the production designer. The production designer on this particular film was J. Michael Risen. He was responsible for bringing the visual elements of the movie to life. His design aesthetic was critical to the success of the scene. Mr. Risen designed the set that accurately represented a military court room. He did not complete this task alone. The production designer also joined with the art director to finalize the shot. The art director was David F. Klassen. He worked with Mr. Risen in designing the courtroom. This included the light fixtures on the wall, the wood paneling in the court room, the military uniforms and the makeup for the actors. Mr. Risen and Mr. Klassen were responsible for ensuring the set met the visual standards described by the director. The success of thisShow MoreRelatedThe New York Times Stated That In 2016, â€Å"American Adults1152 Words   |  5 Pagesadvertisements are lodged with persuasive techniques. Secret’s deodorant commercial can best be dissected, and attempted to figure out the persuasive techniques, by applying the critical process that is used in media. This process involves description, analysis, interpretation, and evaluation. After the breakdown of the Secret deodorant commercial, it is evident that the advertisement contains the hidden-fear technique, the bandwagon effect, and the association principle. 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The audience like to know what to expect of a film before they go and see it. The audience is given a taste of the story and the basic plot. This is done by showing an array of clips that are edited to a certain degreeRead MoreAfrican American Stereotypes. Paper1208 Words   |  5 Pagescomplain that the system is set up to prevent black people from attaining certain positions†, is very common. If they accept these stereotypes and believe them they will limit them selves. Barack Obama who holds the highest office in America is a good example of how this stereotype is false. Some stereotypes are set up to be positive, this does not make the practice of perpetuating these African American stereotypes right. 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As I am a teenager I can identify with the target audience and therefore decide whether the adverts successfully target their audiences. The two adverts I choose to analyse were very different; although they were both aimed at the same target audience, they used different persuasive techniquesRead MoreThe Importance Of A Qualitative Analysis Of Comparative Market Data For Your Business Essay2393 Words   |  10 Pages5. Identify and review a range of external sources of information (such as relevant books and articles, information on the internet, benchmarking studies) in order to conduct a qualitative analysis of comparative market data for your business. Write up the results of your qualitative analysis. External sources of information Results of reviewing these sources Book name: Guide to the Fashion industry Written by Holly Han Published in 2003, by Vault Inc. 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12 Arthropod Pictures Showcase Spiders, Crabs, and More

Reflective Reflection - 1022 Words

As I look back and reflect on all that I have learned from my experiences from Afro-Am 151, I realized that I have learned much more than I expected to. I thought that I would just be learning about the concepts of the course, but I also learned who I am as a person, and even changed some of the ways I look at the world we live in. Going to my placement site of Packer helped me to better understand the concepts we learned about in class, as well as my inner feelings about the concepts. I learned that I used to think about and view the world in a way that most Americans do today as well. The problem with this is that it is not the best way to go through life. Growing up, I lived in a mostly white town, so I didn’t really think much about†¦show more content†¦I learned that they are no different than kids that come from money. Kids are kids. Eventually, I got to the point in the semester where I stopped thinking about their appearance and background because it didn†™t matter. They helped me notice things about the world that I hadn’t thought about before. One of the boys I was reading with one day pointed out that in all the books he reads, the characters are always white. Up until that point, I hadn’t noticed this. Now, whenever I read a book or watch TV or a movie, I make the same observations. The media is partially to blame for the way people feel about certain races because the majority of the things they show feature white people. The material they do show about other races is negative, which only fuels the negative thoughts and stereotypes. I thought it was really sad that kids are picking up on this trend because it makes it harder for them to find characters they can relate to and may develop negative thoughts about themselves as a result. I am grateful I was able to go to Packer because it opened my eyes to the injustices that kids face today. I would like to thank everyone at Packer for the amazing experience they pr ovided me with. You all made it an enjoyable time and welcomed me into the center. I appreciate all the help the workers did for me and the kids this semester. Justin, Rita and Atasha do so much to keep the center running smoothly. I wentShow MoreRelatedReflective Reflection On Reflective Practice2289 Words   |  10 PagesReflection is considered as a state of mind which is a continuous practice (Fanghanel, 2004, p. 576). It yields confidential and safe ways to demonstrate personal experiences as well as continuously challenging perceptions, illusions and biases that can be damaging to cultures and society. Reflective practice enables the practitioner to learn about themselves and their work, their culture and society in which they live. As a counsellor, the role of reflection is something that is essential in orderRead MoreReflective Reflection Essay999 Words   |  4 Pagespractising exist for counsellors, with reflective practice becoming more popular amongst practitioners. 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Audience Analysis Characteristics Of My Classroom Audience

Audience Analysis: Characteristics of my Classroom Audience Audience analysis is described as the process of examining information about your listeners. Then using that analysis helps you adapt your message so that your listeners will respond as you wish (Steven A. and Susan J. Beebe, 2015). It is highly important to read your audience when presenting a speech, the first thing I noticed about my classroom audience was everyone has a good sense of humor and were open minded as to what they might be hearing. In this paper I will be analyzing my classroom audience and describing how they might react to my speeches and what is the best way to present my speeches. I will discuss the differences between each person and how their views will shape my speeches as a whole because ultimately I must appeal to my audience. When I gave my first speech to the class about my life I was very nervous, I didn’t know any of these people and they didn’t know me, but by the end of my speech I realized it wasn’t that bad and we all get stage fr ight so it was okay that I was nervous. I saw then how understanding my audience was and they won’t judge my speeches as a whole based off of one mishap. While standing in front of the class presenting I saw a lot of head nodes indicating to me that they were following along with what my life was about and they showed interest by laughing, and by doing these thing they we unknowingly giving me feedback about how I was doing and weather they liked what theyShow MoreRelatedThe Mental Models Chapter Of Meaningful Learning With Technology Helped Me Understand The Complex Thinking Involved With Creating Mental973 Words   |  4 Pagesworking and then determine, with the cognitive aid of mind mapping, where I could focus my work and the work of our students. 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Responsibilities of the HR Director and Line Manager

Question: Describe the responsibilities of the HR Director and Line Manager in the selection process? Answer: The main responsibility of the Human Resource director and line manager in the procedure of selection of an employee is to make them aware of all the facts and circumstances relating to the employment and also about the benefits available for the employees; they are also responsible to describe the risk factors in course of the employment. There are various factors relating to the selection process and the same number of responsibilities is also there for HR directors and Line managers. The following are the some of the responsibilities of HR director and Line manager:1. Job description: The HR director makes sure that the job description is properly written for all the staffs in process of selection. The Line manager of the company may write job description for the purpose of direct report (Sparrow, 2010).2. Recruitment: The HR director is empowered to look after all the factors relating to the selection procedure in general especially the documentation process. Line manager might b e responsible for selection as well as recruitment of direct reports (Wright, 2011).HR director with the approval of executive director selects and recruits all the direct reports. The Line manager is empowered to conduct the screening procedure in accordance with the specified protocol.HR director look after the entire procedure in relation to the screening and makes necessary changes in such procedure if needed. 3. Orientation: The HR director as well as the Line manager of the company in the process of selection specifies the orientation of the business and the further perspective as to orientation just after selection (Grensing-Pophal, 2010).4. Compensation and benefits: The Line manager takes part while deciding the compensation and benefits for the new employees and the HR director conveys the amount of compensation as well as other benefits to the candidates in the selection procedure. In case of negotiation of salary or other benefits for the employees that also be done by the HR director of the concern company, these negotiation is subject to prior approval from the Executive director of the concern company (DiMartile, 2012).5. Conveying rules and regulations: In the course of the selection of a new employee the HR director is responsible to make the candidate aware of all the facts relating to the rules and regulations of the company. The Line manager takes part in process of the com pany ion relation to any amendment in the existing rules and regulations of the company.6. Health and safety: The HR director of the company is liable to disclose all the factors relating to the health and safety measures taken by the company and the kind of risk is carrying by the employee in the course of the employment, to the applicant of the employment at the time of selection process, it is the duty of the Line manager to look after the things that whether the facts relating to the risk and safety is properly described or not in the procedure of selection. References DiMartile, D. (2012). Understanding the secrets to career advancement. Bloomington, IN: IUniverse Inc.Grensing-Pophal, L. (2010). Human resource essentials. Alexandria, Va.: Society for Human Resource Management.Sparrow, P. (2010). Leading HR. Basingstoke: Palgrave Macmillan.Wright, P. (2011). The chief HR officer. San Francisco, Calif.: Jossey-Bass.