A new approach for analysing availability of flexible workflow (FW) based on stochastic coloured Petri net (SCPN) is proposed.On the basis of discussing the formal definition of SCPN,the SCPN models of exception handling for basic unit and typical structure are constructed respectively,and they effectively describe the dynamic behaviour features of exception handling-oriented FW system.In end of the paper,taking staff training business in a certain enterprise as the example,the curve of availability index of the system is derived,and the validity of the proposed approach is verified.%提出一种基于随机有色Petri网SCPN(Stochastic Colored Petri Net)的柔性工作流可用性分析方法.在探讨SCPN形式化定义的基础上,分别建立基本单元异常处理的SCPN模型和典型结构的异常处理的SCPN模型,有效地描述面向异常处理的柔性工作流系统的动态行为特性.最后,以某企业员工培训业务为例,得到系统可用度指标的变化曲线,验证了所提方法的有效性.
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