EPN can be used to simulate the planed management systems. A EPN simulator, which describes the graphical model of a planed management system, has been applied to calculating the time parameters and to optimizing the system.

• 用EPN模拟计划管理系统,用EPN仿真器构画计划管理系统的图模型、求系统的时间参数、进行系统的优化。