Research And Design Of Workflow Engine In PDM

With the development of e-commerce, the database products based on data processing have reached their steady periods, while those dealing with process management will get their high speed evolution. Interiorly, along with the criterion of enterprises' management and the expandedness of enterprises' scale, the enterprise's computer management system will not only stay on information management but step forward to complicated business process management. As the support center of business systems in enterprise, workflow management system (wfms) has its special characters with different enterprises. About the wfms in PDM, it's usually used to the business of enterprise's document management. Some works were done in this paper about wfms' engine research & design. At first, some research information about workflow technology at home and outside were introduced, also with the WFMC's workflow reference model and engine reference model. After the research of engine reference model's five interfaces, three pop process model schemes were analyzed: business rule based model scheme, varied Petri net based model scheme and oriented chart based model scheme, their model ideas were discussed separately. With thorough analysis of customer's requirement, a solution which compiled the model file to assembly was adopted. Depend on this solution, first the oriented chart based model scheme was chosen as process model scheme, and twelve model elements and the process model's XML expression were designed out. Second the workflow model and workflow engine model's architecture were researched. Third the engine's three data models: organization model, information model and process model were analyzed. After that, several model element's computer methods, also with the system's error disposition were given. At last two key technologies were researched, one was data's get/set operation based on DataSet, the other was distributed release technology based on remoting. About the implement, ZTE's CPC_ZTE_PDM software system has been using this engine and running well. In the end, summary and expection of this research were given.