Abstract: It is a crucial step for conceptual design to realize product process. Effective product conceptual design can raise quality, reduce cost and shorten time to market, so it can satisfy customer requirements accurately. How to realize product conceptual design process modeling is the hot problem of engineering design field researches. At first, the characteristics of conceptual design problem are summarized, the product, product-environment and structure for the product design using set theory are represented, and primitive components, primitive compound components and connectors using formal methods are described. Second two kinds of design process models for conceptual design are established, and by analyzing product design processes, process customization is realized for product conceptual design. At last, a simple design verification case of conveyer mechanism in plastic box seal-cutting machine for a special purpose is presented to show an application.

Key words: Conceptual design, Formal method, Primitive product, Process customization, Set theory