Abstract
This paper researches on knowledge management system in product conceptual design. System framework is supported. This system includes four modules. First, translating and decomposing users’ design requirements using function-method tree. Second, using design case and constraint to describe the process of knowledge retrieval. One is to get the similarity of case function through matching function units’ attribute values which is weighted. Another is proposing a similarity constraint retrieval algorithm for similarity case retrieval. And then, Patch case is defined. Patch case for user’s design requirement is attained through a patch algorithm. Knowledge reuse and innovation is based on patch case. Four, knowledge retrieving from organization external is supported to knowledge base, case base and data base. At last, application example is constructed to explain this process.
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