Role of systematic approach to the Yaoyorozu information society

The Yaoyorozu information society has a great deal of decision makers and is very complex in comparing with ubiquitous one, which has only one supreme decision maker. The context awareness is one of the keywords to cope with the complexity. However, it causes more difficulty in the society because humans and machines in the Yaoyorozu information society act based on the context, which depends on time, place and occasion. A systematic approach is inevitable to solve such a complex problem. It consists of visualization, modeling and optimization. We show here availability of the systematic approach as in cooperation of home appliances.