抄録
The former paper showed the importance of process study by the criteria of digital data to apply IT tools according to their characteristics by way of vitalize Japanese strength to make PLM systems in the Japanese industry, and shows the related 9 essential elements. This following paper reports about the know-how of those essential elements in detail, and adds the studies of the criteria of digital data in the fixing process of specification and structure of the products from the point of data management. Furthermore this report shows the studies of effect from IT investment and corporate IT strategy related to the criteria of digital data from the management point of view. Thus this report clarifies the essential considerations for making a best PLM system from the total point of view.