基于Petri网和UML活动图工作流建模比较

Comparison of Petri Net Based and UML Activity Diagram Based Workflow Modeling

在工作流建模中Petri网和UML活动图各自发挥了十分重要的作用,然而对于其建模的适应性却没有充分的研究。通过对工作流管理系统的分析,认为工作流管理系统具有响应性、协作性和开放性特点。在给定适合工作流建模的UML活动图语义基础上,讨论了工作流建模的几个关键要素在Petri网和UML活动图下的建模比较。通过分析认为,Petri网更适合于封闭、主动系统的建模,UML活动图能够较为充分的适应开放、响应型系统的建模,Petri网较适合对稀有资源的建模。因此UML活动图更适合工作流这种开放、响应型系统建模。

Petri Net and UML Activity Diagram have both been play very import roles. But there are no researches on whether they are adaptable. It＇s concluded that WFMS is reactive, coordinate and open when WFMS is analyzed. Since UML activity diagram has no proper semantics for workflow modeling, it has been proposed based on statechart. It was compared that how to use Petri Net and UML activity diagram to model worlrflow. Then the conclusions are drawn that Petri Net is fit for the modeling of closed and active system; UML Diagram is more fit for the modeling of open and reactive system; Petri Net is fit for the modeling of scare resources. Based on above, the conclusion is that UML Diagram is more fit for workflow modeling.