Abstract
The role of engineers is not to choose the function what customers want but tochoose a good generic system to perform the function required. There are many generic systems to perform the same required function. From the view point of quality engineering, a simple system is not good to improve its functionability. A system to be developed should have enough complicate non lineality. Otherwise, we can not develop a generic system to reach the level of high functionability at reasonable cost by setting.level of various parameters of thesystem. The generic technology development using a test peace is the best time to improve robustness of technology is emphasized in this article.
