Abstract
Recent industries and society have been facing advanced, complicated and uncertain problems. Therefore, we need design science to solve those problems systematically. In this paper, first a design process is modeled as a cycle consisting of four sub-processes: (1) observing a user and finding needs and problems, (2) planning and creating a product to respond to the needs and solve the problems, (3) providing values to a user, and (4) educating and nurturing creative and innovative designer. Based on the design process model, how and where science should contribute is discussed. Along the discussion, some of the related studies by the author are described.