抄録
For designing, problem-setting is no less important than problem-solving, when design problem is a "wicked problem", which cannot be definitely formulated, but should be clarified or reframed through the design process. This paper develops a model of design process as an inquiry, where its logical, ethical, and esthetical dimensions are distinguished and related, based on a reinterpretation of C. S. Peirce's theory of inquiry and normative science. This model explains why and how problem-setting must depends on ethics and esthetics, rather than on logic. We use this model to explore how design problems are clarified and reframed.