In the face of the high variability in the completion of construction projects, the following research is generated. In the literature we can find several proposals to program projects, however, the variability of the activities causes high variability in the completion date of the projects. We hope that the proposed method, by controlling the start of activities, will ensure the completion date of the projects, by fixing the start of every activity with a high level of probabilistic confidence for the planned project duration. The proposed fixed start method (FSM) was tested in two case studies by using discrete event simulation. Project completion duration results were compared with the critical path method (CPM) and the program evaluation and review technique (PERT). Project completion was evaluated in the case studies by the coefficient of variance (COV), mean, and variance. The new method decreased the scheduled duration variability while meeting project completion times.

面对建设项目完成过程中的高度可变性，产生了以下研究。在文献中，我们可以找到一些对项目进行规划的建议，但是，活动的可变性会导致项目完成日期的可变性高。我们希望通过控制活动的开始，通过在计划的项目持续时间内以较高的概率置信确定每个活动的开始，所提出的方法将确保项目的完成日期。通过使用离散事件模拟在两个案例研究中测试了建议的固定启动方法（FSM）。将项目完成工期的结果与关键路径法（CPM）和程序评估与评审技术（PERT）进行了比较。在案例研究中，通过方差系数（COV），均值和方差来评估项目的完成情况。新方法减少了计划的工期可变性，同时满足了项目完成时间。