In recent years, enterprises are facing the impact from the Financial Tsunami, factories moved outward, high production cost, shorter product life cycle, larger customization and global fierce competition. In order to survive, enterprises have to circulate all kind of information within the enterprise and supply chain to leverage the operation. This article presented five case studies including Hewlett-Packard, Ericsson, NEC, OKI, and Acer. We hope that sharing those five cases to promote the PDM applications into more companies.