The five basic modeling elements (I. E. The root element, the activity element, the link element, the start element and the end element) were first introduced in this paper; then the detailed steps to prepare the research project scheduling under uncertain situations by utilizing this template were discussed; finally, the time schedule of a research project was prepared by using the template, and the following important time schedule information was obtained through 500 simulation runs:the time - completion probability curse of the research project ; the maximums, minimums, means, and standard deviations of the Early Start, Early Finish, Late Start, and Late Finish of all activities in the project; the criticality indexes of different activities.%描述了CEM_PERT模板的5个建模要素,即根要素、工作要素、连接要素、开始要素和结束要素,讨论了利用CEM_PERT模板建立不确定环境下科研项目进度计划的步骤,并利用该模板建立了某科研项目的进度计划,得到了该项目500次模拟运行的时间-完成概率曲线；项目中不同工作最早开始时间、最早完成时间、最迟开始时间和最迟完成时间的最小值、最大值、均值和标准差；以及不同工作的关键指数.
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