DFM Guidline-Senmina english

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DFM Guidline-Senmina english

INTRODUCTION
' `6 ^: @* z; X4 r0 r- Y In general terms all defects found in manufacturing are caused by the design, the process or material. However,according to a study conducted to evaluate the impact of design on product quality, the cause of 40% of quality problems was found to be poor design1 . A product design must not only meet peRFormance requirements but should also minimize life cycle cost and technical risks. This is accomplished through an awareness of how design decisions affect the manufacturing process, including capabilities and limitations. DFX is a philosophy of designing a product so that it can be produced with the least cost and highest level of quality and reliability. DFX is both an analytical process and a creative science that draws on many engineering disciplines. The most important single design practice for Manufacturability is simplicity. A simple design can be manufactured at higher levels of quality and lower cost than a complex design. A critical factor in developing designs that are easy to produce is a clear understanding of the manufacturing process capabilities and limitations. Design requirements and guidelines must incorporate small changes in design parameters and tolerances that facilitate ease of operation for a particular manufacturing process.
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