機能の設計・使用構造モデリングに基づく人工物の循環型設計手法の提案

抄録

Recently, the essence of the value of artefacts has been recaptured from value-in-exchange to value-in-use. Because such value is subjectively evaluated based on the perceived function of users, the designers should improve their value through the circular design process, in which designers repeatedly reflect on and redefine artifact functions by referring to the information related to users' received functions. However, previous functional modelling methods have not addressed the comprehensive structure of functions that clarifies the relationship between provided functions and received functions. This gap causes the difficulty to capture the consistency between these functions, thus, the designers struggle to practice reflection and redefinition of artifact functions logically. Based on aforementioned background, this research clarifies the comprehensive structure that enables understanding of the relationship between provided functions and received functions. Then, this research develops a method to identify the incompatibility between provided and received functions by modelling the comprehensive structure of these functions in a formal procedure. The proposed method was applied to a design case of water quality improvement equipment, and this result demonstrated that the proposed method can describe the process by which designers reflect and redefine their provided functions with their users' received functions.