Abstract: Workflow modeling technique has been the basis for the entire business process implementation,so selecting efficient modeling techniques for achieving actual complex business processes is particularly important.The time performance evaluation is also an important aspect in the evaluation of workflow models.Firstly,the workflow modeling techniques based on Petri nets are introduced.And then a complex process of production and operation is combined to construct a simplified and flexible model.The average time performance is analyzed using the stochastic Petri net.The results show that a complex model can be analyzed effectively and simply by the proposed performance analysis method.

Key words: workflow;Petri net;workflow net;time performance