In design process, decision making with a great choice is very difficult, and we need some kind of criterion. Sense of value, image, conceptualizing, goal and others are musually interwound, and they can not be unified. If a man acts logically, the normative model by von Neumann-Morgestern is useful in decision making. However, it is impossible for a man to act logically always. The convex dependence theory which seems to compensate man's illogicality can not also solve the actual problems. Decision making in design process is the bulletin of his total personality, and it must possesses a synthesis. The most important key-word of the synthesis is circulation. We must stop the production system with waste which can not be circulated. The authors propose a circulated production system and countermeasures for the waste
