Studies on structure of product design information flow based on information measurement

In order to qualitatively and quantitatively describe the information state of each link in PLM design stage, through information entropy analyzes the uncertainty of information state of each link in design stage, through information distance analyzes the size of obstacles encountered for each link to achieve a certain state. Then TBS method had been used for establishing, the three-dimensional model of product and analyze its information state. The results show that when the customer demand increases, the needed information of product will increase in state's transition. To provide information basis for the development process of design stage in PLM by analyzing the information status.