WBS is always used to substantiate the bound of project, by which engendering the plan before optimizing it.A method of random simulation by computer is presented to optimize the plan.

• 航空型号研制项目范围管理采用的主要方法是WBS工作分解结构，进而依据WBS形成计划，再进行计划的优化，本文提出了一种随机模拟法优化计划的方法。