关键词: 产品设计, 过程建模, 路径搜索, 耦合, 层次关系

Abstract: The process model could reduce the degree of coupling between the product design tasks and number of iterations of the design process. Thereby it effectively improved the design efficiency and reduced design costs．Characteristics of product design process model were analyzed firstly. The directed graph was introduced to describe the relationship among design tasks based on analysis. The model of product design process was established based on path search. By transforming the dependencies between the design tasks into relationship matrix, element path in the matrix was searched to reorganize and optimize the design tasks. The hierarchical relationships among design tasks were achieved. The model of product design process was implemented by using C++ language. Finally, the QTZ80H tower crane boom was used as an example to illustrate the process model. The results suggested that this method could effectively determine the coupling between the hierarchies, solve iterations of design tasks and optimize the design process.

Key words: product design, process model, path searching, coupling, hierarchy