Engineering Design: A Systematic Approach by Gerhard Pahl Dr.-Ing. Dr. h.c. mult, Wolfgang Beitz Dr.-Ing.

By Gerhard Pahl Dr.-Ing. Dr. h.c. mult, Wolfgang Beitz Dr.-Ing. (auth.), Ken Wallace (eds.)

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Both guidelines have been developed by a VDI Committee comprising senior designers from industry and many of the previously mentioned design methodologists from former West Germany. 9. Basic working steps of Value Analysis (after DIN 69910). :! S! ... Principles solutions ... Module structures co. :! :! a... ~ "'"... <:> ... <:> u. c: '" 1ii i! 11 Phases III Premilinary layouts ... 1!! 4l! 10. 144]. specific and company-specific variations. 10 should therefore be regarded as a guideline to which detailed working procedures can be assigned.

2 The Necessity for Systematic Design 15 The second working step is a systematic search for solution elements and their combination into working means, ie working principles. Hansen attaches great importance to the third step, in which any shortcomings of the developed working means are analysed with respect to their properties and quality characteristics, and then, if necessary, improved. In the fourth and last step, these improved working means are evaluated to determine the optimum working means for the task.

In original design an ordered and stepwise approach, even if this is on a partially abstract level, will provide solutions that can be used again. Structuring the problem and task makes it easier to recognise application possibilities for established solutions from previous projects and to use design catalogues. The approach of developing size ranges and modular products is an important start to rationalisation in the design area but especially important for the production process (see 8). The stepwise concretisation of established solution principles makes it possible to select and optimise in an early stage with a small amount of effort.

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