At the time of quality control, it is not to depend on the inspection item in activity of improvement maintenance of quality last process, the respective role and important matter, intended goal and effectiveness etc. are made clear all processes (process) in, interrelationship between process is grasped precisely, method of thinking the inferior goods and occurrence of mistake decreasing.

This in each processing, "input" "resource information" observing to "activity method" "output", it defines decision criterion,those management(control) it does properly via PDCA cycle. Furthermore PDCA is done the system which each process connects (quality management system) in, it has become the model that the whole is done management (manage).

In quality control, "quality" is not quality of the product and service itself, it is quality of method = process and the management of the work which produces that, the management resource (the talent, organization, equipment and technology) it points to circularity. Via the improvement of such "cause", the sale and the profit and product service, you called safety and environmental measure, you think that "the result" is produced.

WithISO 9000:2000 process approach is listed to one "of 8 principles of quality management system", in order the quality management system which was constructed is executed to keep improving effectiveness efficiently, continuously, the adoption is recommended.