Information organizing principle is one of the key issues of intelligent master model (IMM), which is an enhancement of the master model (MM) based on KBE (knowledge-based engineering). Despite the fact that the core product model (CPM) has been confirmed to be an organizing mechanism for product master model, the key issue of supporting the information organizing for IMM is not yet well addressed, mainly due to the following two reasons; (1) lack of representation of complete information and knowledge with regard to product and process, including the know-why, know-how, and know-what information and knowledge, and (2) lack of semantic richness. Therefore, a multiaspect extension to CPM was first defined, and then an ontology was constructed to represent the information and design knowledge. The extension refers to adding a design process model, context model, product control structure model, and design rationale model to CPM concerning the enhancement of master model, which is to comprehensively represent the reason, process, and result information and knowledge of theproduct. The ontology construction refers to representing the concepts, relationships among these concepts and consistency rules of IMM information structure. Finally, an example of barrel design and analysis process is illustrated to verify the effectiveness of proposed method.

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Traditional workflow engine is lack of flexibility when applied to product design process, therefore this paper designs a flexible workflow engine based on B/S architecture. Firstly, this paper analyzes the product design process and its flexibility need, then analyzes and designs the framework of the flexible workflow engine. In the framework of the engine, dynamic modifier module is an important part to realize the flexibility. Secondly, this paper illustrates the operation process of flexible workflow engine with a product design case to verify its applicability and effectiveness.