受給・提供構造分析に基づく機能設計支援手法の提案

抄録

Due to the recent improvement in the social living standard, products/services are required to realize a high value for users. Because the value of them are 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 designers' provided functions by referring 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 provided function logically. Based on aforementioned background, this research clarifies the comprehensive structure that enables phenomenological understanding of the relationship between provided functions and received functions. Then, this research develops a method to identify the inconsistency between received and provided functions by modelling the comprehensive structure of their functions in a formal procedure. The proposed method consists of a receive-provide structure modelling framework and its usage process. This study refers to previous studies on the view model and the function-behaviour-state diagram as the theoretical basis for building the framework and enabling designers to capture the integrative of designers and users. The proposed method was applied to a closed water district environment improvement service, and this result demonstrated that the proposed method can describe the process by which designers reflect and redefine their provided functions from their users' perspectives.