PPM時代の品質管理

－品質管理と品質工学－

抄録

In recent years, quality demands have become increasingly stringent. Demands on the order of ppm and even demands for no defects at all are taken for granted,but means for assuring ppm-order quality have yet to be established. Prior attempts to establish such means have focused on process management and inspection, but when management and inspection are combined they become more intricate and complex, and the independence of quality assurance from process management is lost. These problems then become a major obstacle to productivity improvement. They seem to be rocking the foundation of the Japanese management, which is based on the simultaneous pursuit of quality and improvement (cost reduction). Working from the idea of producing products of uniform quality, this study attempts to establish a ppm-order quality assurance system by inspecting each product to see that it is identical to a known good product, utilizing the MT method of quality engineering. It presents new ideas for ppm-order quality management through ensuring the independence of quality management and quality improvement activities from quality assurance and applying ideas of on-line quality engineering and parameter design.