Dfma Final Exam

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Question 2. a)


1) Surveys shows that reduction in product manufacturing cost is not necessarily considered to be the most desired outcome of redesign efforts. The example in Fig. 1.10 shows that reduced time to market and improved quality were thought to be more important than cost reduction.

FIG. 1.10 Survey on importance of reductions produced by DFMA. (From Reader poll, Computer-Aided Engineering, June 1 993.)

2) DFMA provides a systematic procedure for analyzing a proposed design from the point of view of assembly and manufacture. * This procedure results in simpler and more reliable products that are less expensive to assemble and manufacture. In addition, any reduction in the number of parts in an assembly produces a snowball effect on cost reduction because of the drawings and specifications that are no longer needed, the vendors that are no longer needed, and the inventory that is eliminated. 3) DFMA tools also encourage dialogue between designers and the manufacturing engineers and any other individuals who play a part in determining final product costs during the early stages of design. * teamwork is encouraged and the benefits of simultaneous or concurrent engineering can be achieved. 4) The savings in manufacturing costs obtained by many companies who have implemented DFMA are astounding. Question 2. b)

The Ugly Baby Syndrome
* Difficulties can exist when an outside group or a separate group within the company undertakes to analyze current designs for ease of manufacture and assembly. * Significant improvements could be made to the current design, and when these improvements are brought to the attention of those who produced the design this can result in extreme resistance. * Telling a designer that their designs could be improved is much like telling a mother that her baby is ugly! * It is important, therefore, to involve the designers...
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