論説
マネジメントのための品質工学 12.品質工学に関する組織と責任
2001 年 9 巻 1 号 p. 5-12
詳細
2001 年 9 巻 1 号 p. 5-12
There are two types of qaulity.
(1)Customer Quality : that a customer wants
(2)Engineered Quality : that a customer does not want
The former is the feature including performance and the later customer's loss due to failure of performance, operational cost and public pollution. Produt planning, product design and production people are a hundred percent resiponsible on quality as other people do nothing on the quality. Product planning people are resiponsible fbr market size due to customer quality. Product design people must be resiponsible 93.75% of market claims and manufacturing people 6.25% when the safety factor is 4. Because the loss function is proportionate to the square deviation from target function and the square of 0.25 is 0.0625. All the recall problems by poor design is a hundred percent resiponsible by quality assurance people as it is caused by miss-judgement of the quality of the products. The recall problems by miss of production people is a hundred percent resiponsible by quality control people. When the cause is unknown. We need life test for functionality due to unknown item or animal test for poisoness by unknown items.
