Binary Information Press
Customer requirements cannot be directly used in design process because they are fuzzy, complex and nonstandard. But customer's expectation to product performance index is embedded in customer requirements. A method based on Vague set theory for fuzzy attributes is discussed, which is to merge and map requirements information obtained from multiple means, in order to get product performance index most concerned by users. Two-stage data fusion algorithm based on Vague set achieves mapping customer requirements to performance index in products design.