Workflow Process Modeling Based On Uml Activity Diagrams

Although UML activity diagram is magnitude component in UML, which agrees with modeling system dynamic process and describing workflow, it is immature in itself with the characteristic of non-oriented-object and essentially different from other UML diagram, and need to be ameliorated especially when applicated in workflow, own to the following limitation:Firstly, activity diagram describes the behaviors of object class that response the inner action, so UML activity diagram is generally on the assumption of that there is no interruption caused by outer events during the process and no time defer, which limits the ability of UML activity diagram discribing complicated process; Secondly, User cannot obtain enough information of object data, and cannot make sure the character of mutual objects because of actually complicated Object and relatively simple object expression in UML activity diagram; Lastly, owe to lacking rigorous mathematical basis and strict, effective methods of validation and analysis, UML activity diagram cannot support the simulation and optimization of workflow, let alone optimizating the model based on the result.So this dissertation brought forward modeling method in extensive UML activity diagram, based on the research of workflow, UML activity diagram and Petri net, and with the fusion of the advantages of UML activity diagram and Petri net technique, whose main idea is to extend the workflow's relative characteristics of UML activity diagram with the extensive system of UML activity diagram. To analyze and simulate the model strictly, this dissertation supplied the reflection system from UML activity diagram model to WF-net, used the ability of the analysis and simulation to analyze the complex dynamic relations in models, and improve the model effect on the base of the results.