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The process is highly [[iterative]] – parts of the process often need to be repeated many times before another can be entered – though the part(s) that get iterated and the number of such cycles in any given project may vary. It is a [[decision making]] process (often iterative) in which the engineering sciences, basic sciences and mathematics are applied to convert resources optimally to meet a stated objective. Among the fundamental elements of the [[design process]] are the establishment of objectives and criteria, synthesis, analysis, construction, testing and evaluation.<ref>{{cite web |title=Criteria for Accrediting Engineering Programs, 2019 – 2020 |url=https://www.abet.org/accreditation/accreditation-criteria/criteria-for-accrediting-engineering-programs-2019-2020/#definitions |website=ABET |access-date=15 September 2019}}</ref>  ==Common stages of the engineering design process== It's important to understand that there are various framings/articulations of the engineering design process. Different terminology employed may have varying degrees of overlap, which affects what steps get stated explicitly or deemed "high level" versus subordinate in any given model. This, of course, applies as much to any particular example steps/sequences given here. One example framing of the engineering design process delineates the following stages: ''research, conceptualization, feasibility assessment, establishing design requirements, preliminary design, detailed design, production planning and tool design, and production''.<ref name="refB">Ertas, A. & Jones, J. (1996). The Engineering Design Process. 2nd ed. New York, N.Y., John Wiley & Sons, Inc.</ref> Others, noting that "different authors (in both research literature and in textbooks) define different phases of the design process with varying activities occurring within them," have suggested more simplified/generalized models – such as ''problem definition, [[conceptual design]], preliminary design, detailed design, and design communication''.<ref>Dym, C.L. & Little, P. (2009). Engineering Design. 3rd ed. New York, N.Y., John Wiley & Sons, Inc.</ref> Another summary of the process, from European engineering design literature, includes ''clarification of the task, conceptual design, embodiment design, detail design''.<ref>Pahl, G. & Beitz, W. (1988). Engineering Design: a systematic approach. London, UK, The Design Council.</ref> (NOTE: In these examples, other key aspects – such as concept evaluation and prototyping – are subsets and/or extensions of one or more of the listed steps.) ===Research=== Various stages of the design process (and even earlier) can involve a significant amount of time spent on locating information and [[research]].<ref name="ReferenceA">A.Eide, R.Jenison, L.Mashaw, L.Northup. Engineering: Fundamentals and Problem Solving. New York City: McGraw-Hill Companies Inc.,2002</ref> Consideration should be given to the existing applicable literature, problems and successes associated with existing solutions, costs, and marketplace needs.<ref name="ReferenceA"/> The source of information should be relevant. [[Reverse engineering]] can be an effective technique if other solutions are available on the market.<ref name="ReferenceA"/> Other sources of information include the Internet, local [[libraries]], available government documents, personal organizations, [[trade journal]]s, vendor catalogs and individual [[experts]] available.<ref name="ReferenceA"/> ===Design requirements=== Establishing design [[requirements]] and conducting [[requirement analysis]], sometimes termed '''problem definition''' (or deemed a related activity), is one of the most important elements in the design process<ref>Ralph, P., and Wand, Y. A Proposal for a Formal Definition of the Design Concept. In, Lyytinen, K., Loucopoulos, P., [[John Mylopoulos|Mylopoulos, J.]], and Robinson, W., (eds.), Design Requirements Engineering: A Ten-Year Perspective: Springer-Verlag, 2009, pp. 103–136.</ref> in certain industries, and this task is often performed at the same time as a feasibility analysis. The design requirements control the design of the product or process being developed, throughout the engineering design process. These include basic things like the functions, attributes, and [[specification]]s – determined after assessing user needs. Some design requirements include hardware and software parameters, [[maintainability]], [[availability]], and [[testability]].<ref name="refB"/> ===Feasibility=== In some cases, a [[feasibility study]] is carried out after which schedules, resource plans and estimates for the next phase are developed. The feasibility study is an evaluation and analysis of the potential of a proposed project to support the process of [[decision making]]. It outlines and analyses alternatives or methods of achieving the desired outcome. The feasibility study helps to narrow the scope of the project to identify the best scenario. A feasibility report is generated following which Post Feasibility Review is performed. The purpose of a feasibility assessment is to determine whether the engineer's project can proceed into the [[design phase]]. This is based on two criteria: the project needs to be based on an achievable idea, and it needs to be within [[cost accounting|cost constraint]]s. It is important to have engineers with experience and good judgment to be involved in this portion of the feasibility study.<ref name="refB"/> ===Concept generation === A concept study ([[conceptualization]], [[conceptual design]]) is often a phase of project planning that includes producing ideas and taking into account the pros and cons of implementing those ideas. This stage of a project is done to minimize the likelihood of error, manage costs, [[risk assessment|assess risks]], and evaluate the potential success of the intended project. In any event, once an engineering issue or problem is defined, potential solutions must be identified. These solutions can be found by using [[Ideation (idea generation)|ideation]], the mental process by which ideas are generated. In fact, this step is often termed '''Ideation''' or "Concept Generation." The following are widely used techniques:<ref name="refB"/> *trigger word – a word or phrase associated with the issue at hand is stated, and subsequent words and phrases are evoked. *[[morphological analysis (problem-solving)|morphological analysis]] – independent design characteristics are listed in a chart, and different engineering solutions are proposed for each solution. Normally, a preliminary sketch and short report accompany the morphological chart. *[[synectics]] – the engineer imagines him or herself as the item and asks, "What would I do if I were the system?" This unconventional method of thinking may find a solution to the problem at hand. The vital aspects of the conceptualization step is synthesis. Synthesis is the process of taking the element of the concept and arranging them in the proper way. Synthesis creative process is present in every design. *[[brainstorming]] – this popular method involves thinking of different ideas, typically as part of a small group, and adopting these ideas in some form as a solution to the problem Various generated ideas must then undergo a '''concept evaluation''' step, which utilizes various tools to compare and contrast the relative strengths and weakness of possible alternatives. ===Preliminary design=== The preliminary design, or high-level design includes (also called [[Front-end engineering|FEED]] or Basic design), often bridges a gap between design conception and detailed design, particularly in cases where the level of conceptualization achieved during ideation is not sufficient for full evaluation. So in this task, the overall system configuration is defined, and [[schematic]]s, [[diagram]]s, and [[:wikt:layout|layout]]s of the project may provide early project configuration. (This notably varies a lot by field, industry, and product.) During detailed design and optimization, the parameters of the part being created will change, but the preliminary design focuses on creating the general framework to build the project on.<ref name="refB"/> S. Blanchard and J. Fabrycky describe it as: “The ‘whats’ initiating conceptual design produce ‘hows’ from the conceptual design evaluation effort applied to feasible conceptual design concepts. Next, the ‘hows’ are taken into preliminary design through the means of allocated requirements. There they become ‘whats’ and drive preliminary design to address ‘hows’ at this lower level.” ===Detailed design=== Following FEED is the Detailed Design (Detailed Engineering) phase, which may consist of [[procurement]] of materials as well. This phase further elaborates each aspect of the project/product by complete description through [[solid modeling]], [[drawings]] as well as [[specification]]s. [[Computer-aided design]] (CAD) programs have made the detailed design phase more efficient. For example, a CAD program can provide [[optimization]] to reduce volume without hindering a part's quality. It can also calculate [[Stress (mechanics)|stress]] and [[Displacement (vector)|displacement]] using the [[finite element method]] to determine stresses throughout the part.<ref name="refC">Widas, P. (1997, April 9). Introduction to finite element analysis. Retrieved from {{cite web |url=http://www.sv.vt.edu/classes/MSE2094_NoteBook/97ClassProj/num/widas/history.html |title=Introduction to Finite Element Analysis |access-date=2010-11-23 |url-status=dead |archive-url=https://web.archive.org/web/20110514233218/http://www.sv.vt.edu/classes/MSE2094_NoteBook/97ClassProj/num/widas/history.html |archive-date=2011-05-14 }}</ref> ===Production planning=== The [[production planning]] and tool design consists of planning how to [[mass-produce]] the product and which tools should be used in the [[manufacturing]] process. Tasks to complete in this step include selecting materials, selection of the production processes, determination of the sequence of operations, and selection of tools such as jigs, fixtures, metal cutting and metal or plastics forming tools. This task also involves additional [[prototype testing]] iterations to ensure the mass-produced version meets [[qualification testing]] standards.<ref name="refB"/> ==Comparison with the scientific method== Engineering is formulating a problem that can be solved through design. Science is formulating a question that can be solved through investigation. The engineering design process bears some similarity to the [[scientific method]].<ref>{{cite book |last1=Dieter |first1=George |last2=Schmidt |first2=Linda|author2-link=Linda Schmidt |date=2007 |title=Engineering Design |publisher=McGraw-Hill |page=9 |isbn=978-0-07-283703-2}}</ref> Both processes begin with existing knowledge, and gradually become more specific in the search for ''knowledge'' (in the case of "pure" or basic science) or a ''solution'' (in the case of "applied" science, such as engineering). The key difference between the engineering process and the scientific process is that the engineering process focuses on [[design]], [[creativity]] and [[innovation]] while the scientific process emphasizes explanation, prediction and [[discovery (observation)]]. ==Degree programs== Methods are being taught and developed in Universities including: * Engineering Design,<ref>{{Cite web|last=Bristol|first=University of|title=Engineering Design {{!}} Study at Bristol {{!}} University of Bristol|url=http://www.bristol.ac.uk/study/undergraduate/2022/engineering-design/|access-date=2021-06-07|website=www.bristol.ac.uk|language=en-GB}}</ref> [[University of Bristol#Faculty of Engineering|University of Bristol Faculty of Engineering]] * [[Dyson School of Design Engineering]], Imperial College London * TU Delft, Industrial Design Engineering. * University of Waterloo, [[University of Waterloo Faculty of Engineering#Systems design engineering|Systems Design Engineering]] ==See also== *[[Applied science]] *[[Computer-automated design]] *[[Design engineer]] *[[Engineering analysis]] *[[Engineering optimization]] *[[New product development]] *[[Systems engineering process]] *[[Surrogate model]] *[[Traditional engineering]] == References == {{Reflist}} == External links == * {{cite web|publisher=ABET|title=Criteria for accrediting engineering programs, Engineering accrediting commission|url=http://www.abet.org/wp-content/uploads/2015/04/eac-criteria-2013-2014.pdf}} * Ullman, David G. (2009) The Mechanical Design Process, Mc Graw Hill, 4th edition, {{ISBN|978-0072975741}} * Eggert, Rudolph J. 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