ロバスト化と適合のためのパラメータデザイン(<特集>短期開発における品質の作り込み)

概要

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Making the product design period to shorten is hoped for, and then a lot of design parameters are fixed at the draft-drawing stage today. On the other hand, determination of some requirements of the products (ex: specific regulations for luminous intensity of headlights in the region where the vehicle is operated), which was not possible to decide in the drafting stage, is made in the detail-drawing stage. Then the regulation fitting is a compulsory procedure for parts industries. The regulation fitting is different from adjustment or calibration because it involves further improvement of product performance. However, unfortunately the regulation fitting procedure has not been established; therefore, it becomes also the cause of the turning back and the design change. They are serious problems for reduction of lead-time. In this article, some issues to solve in the regulation fitting and measures to cope with them partially are shown. The essential points of the measures are interactions between the control factors and noise factors.
2009-07-15