Abstract
Industrial designers are new-creating both function and attribute of product in the conceptual design process. Quality of product depends heavily on their creative thinking. Therefore, it is difficult that computer-aided system supports a creative and inventive thinking process. We proposed the methodology of Conceptual and inventive Design Support System (CDSS) for its difficulty and estimated this methodology to satisfy the requirement. As the result, we confirmed that the analysis model of bottom-up thinking process is difficulty. In this paper, we propose new analysis model by using contact and observer objects into use case diagram for this analysis process. Validity of this model is discussed through the benchmark problem.
