| Because of lack of abstraction at the stage of requirement analysis, the traditional Management Information systems of Engineering Designing Project are not suitable to dynamic recomposition of business management process. This paper will combine Workflow Technologies with Management Workflow System of Engineering Designing Project (EDWFMS). By decomposing work into good-definitioned tasks and roles and executing and monitoring them according to rules and processes, we can boost efficiency, reduce cost, enhance level of business management of engineering design department. There are many complex engineering data in engineering design system. Engineering design transaction is very different from traditional business transaction. The traditional and commercial workflow system can't meet the requirement of engineering design and project management finely. Hence, it is imperative to improve and expand it. This paper will research modeling method of workflow system, designing and storing method of object data model, transaction execution, and version control of resource combined with characteristics of engineering design. The theory and techniques of modeling method related to Petri net have been mature today, so we extend some functions based on it and construct the color extended Petri net (CXPN) suitable to engineering design and project management. Considering price, efficiency of retrieving and storage for data model, and degree of technologies maturity and so on, we choose RDBMS to store data model of EDWFMS. Because engineering design process has the properties of long duration, this paper presents a design transaction model of long transaction management so that it supports characteristics of engineering design process. We put forward resource version management model based on version tree to control versions of complex resource. Finally, this paper shows the extended CIS architecture of EDWFMS supporting distributed engineering design and project management.
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