Study of Basic Logic of Diffusion with Specific Models

In recent years, the importance of diffusion has been remarked with many researches, especially in the field of user need, user satisfaction and user innovation. But there are not so many researches to explain the fundamental logic with some specific examples. This paper proposes the fundamental analysis of diffusion with user demand with the study of specific product models. At first, it is necessary to understand the user structures of each product. Because every product´s structural design is based on functional design basically, and functional design is based on user´s demand. So we would like to pick several industries up to describe the users structure, and try to make some typology of these structures of each product. Then, several models would be selected to analyse the diffusion of products to society from the viewpoint of customer participation. We tried to understand the relationship between structure and function of each product with architecture logic, and tried to analyse the fundamental rules to design each product. Then, we tried to analyse how to create the demand of customers for functional design. Especially, construction projects have many stakeholders in every case, and this paper tried to make clear the elements of user demand to create functional design. Finally, we tried to find the user participation with construction projects, and make clear the role and position of users in the projects.