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Method and Process used in Engineering Design.

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Introduction

Method and Process used in Engineering Design Engineering Design requires efficient and careful consideration to solve technical problems related to the satisfaction of human needs. A simple definition of design is to create according to a plan for a particular purpose. Design usually starts with a loosely defined problem for which many possible solutions exist. The engineering design process, which can be viewed as a particular type of problem solving, is an orderly, systematic approach involving iteration and decision making at each step. It can be illustrate by using flow chats or steps. They contain four main phases in order to avoid any risks occurring and help the design process successful. The four main phases are clarification of the task, conceptual design, embodiment design and detail design as shown in fig. 1 and fig. 2. The steps listed below represent one of the many possible ways of subdividing the design process. It is important to emphasize that the solution process is both sequential and highly iterative in nature. 1. Identifying the need 2. ...read more.

Middle

Constraints are often associated with limited resources. Typical constraints are listed below: * Budget * Time * Personnel * Legal * Material properties and availability * Off-the-shelf components versus customized design * Competition * Manufacturability Design criteria are attributes or project goals that enable comparison to be made among alternative solutions. Typical design criteria are listed below. * Cost * Quality * Reliability * Maintainability * Weight * Performance * Human factors * Aesthetics * Safety * Operating environment (temperature, pressure, corrosion) * Compatibility with other systems * Effect on environment (e.g. pollution) Generating alternative solutions Inherently, idea generation and the search for alternative solutions is a creative process that cannot be accomplished simply by following a prescribed algorithm. Brainstorming is one technique commonly employed by a team to generate a range of possible solutions. It is important to ensure that judgment of any ideas is reserved until the session has been completed. At this point in the process, members of the design team should encourage each other to challenge basic assumptions, consider analogies, identify critical parameters, and, in addition to considering novel alternatives, be imaginative in rearranging, recombining, or eliminating existing components or process steps. ...read more.

Conclusion

Implementing the decision Typically, this phase begins with the construction of a prototype product, process, or system based on the technical specifications describing the best solution. Results obtained from testing of the prototype are used to refine and finalize the design. The next step may be to implement a full-scale version of the design. At this stage the designer will likely be interacting with engineers about the next stage of the process involved in a variety of business and management functions. Verifying and evaluating the result The final step in the engineering design process is to verify and evaluate the solution at the large-scale operating or production level. This generally requires sampling or otherwise testing the product, process, or system to confirm the design specifications are being met in practice. Typically, corrections and further refinement of the design will be required before the optimum design is arrived at. Due to technology changes so rapidly, the closing step of the design process often marks the start of a new design process in search of the next generation of products, processes, and systems. New designs may be motivated by improved manufacturing techniques, substitution of better materials with superior properties, or product designs better able to satisfy the latest market requirements. ...read more.

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