抄録
Recent globalization in industries has increased the number of product failures and troubles caused by using them in unexpected ways. It is required to develop a methodology for obviating such troubles in advance in the product design phase by predicting various ways of usage and then analyzing their influences on the product. The authors have focused on the latter point and developed a set of methods for detecting failures considering each way of usage in the product design phase. This research aims at the former point. Definition of ways of usage is discussed. Generation processes of unexpected ways of usage are analyzed from the point of view of functions and “6W2H” and then classified into two classes. For one of the classes of unexpected ways, methods for predicting and modeling them are proposed.
