Construction is one of the main industries. The total cost to be invested and the total number of labors are quite large ratio in every country. At same time, construction has almost every kind of element of industrial action, because buildings are complicated products and every construction project should be for a custom-made building. In spite of importance of this field, there are not so many researches to analyze the total construction system because of many complicated elements of that. The concept of "Architecture" is one of the methods to analyze artificial systems such as product, organization, or construction process. "Architecture" concept is focused on the interfaces between the elements of artificial system, because interfaces tend to identify the characteristics of whole of the system. This paper proposes three discussions. Firstly, the methodology how to understand the tendency of organization "Architecture" is proposed. With this methodology, it is possible to describe and understand the characteristics of construction organizations in different area. The organization "Architectures" in typical construction projects in Japan and in UK are indicated. Secondly, the characteristics of products "Architecture" are analyzed. Each organization "Architecture" type provides its own suitable products' "Architecture." Finally, this paper focuses on the products with integral organizations. There are some serious problems about over-specification of products with these organizations.
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