Petri网在商务工作流建模中的应用研究

Applying Petri Nets in Modeling Business Workflow

在工作流建模研究中,Petri网是一类重要工具。对于跨机构的商务工作流来说,用基本Petri网建模往往会因为图幅规模过大和细节过多而使得其可读性下降。该文提出了一种活动/层次网(A/H-Nets)模型,并给出了建模过程和应用示例。模型通过引入复合位置和子网转移及过程转移的概念,来满足Petri网在不同层次上建模的需求。为了保证层次之间的一致性,文中给出了层次建模必须的子网(过程)替换规则。

Petri nets have been used to model workflow as an important tool.As far as modeling inter-organizational business workflow,Petri nets will make graph ill readable because of too big size of graph and too much detail.A kind of Petri nets called Activity /Hierarchy-Nets(A/H-Nets)is presented in this paper,the modeling process and an example case of business process modeling are provided.By introducing the concept of compound place,subnet transition and process transition,the proposed method can model different hierarchies of business processes.In addition,to keep the consistency between different hierarchies,some replacing rules of subnets and processes which are necessary for hierarchical modeling are also provided in this paper.