研发活动之间常存在顺序重叠和反馈重叠,重叠并行性会加快项目的进度,但又存在返工风险.为此,采用设计结构矩阵(DSM)信息输出和信息输入时间因子矩阵及返工风险矩阵,以更完整地描述活动重叠及其对返工的影响.提出了基于顺序重叠的项目持续时间计算方法和基于反馈重叠导致的返工时间计算方法.针对某案例活动排序优化问题,采用遗传算法以基于重叠的时间计算模型为目标函数进行优化,项目的持续时间和返工时间得到了明显的降低.

Sequential overlapping and feedback overlapping between R&D project activities can shorten project schedule, but also it can result to rework risk. In order to describe perfectly the sequential overlapping and feedback overlapping and their impact on rework, the information output time factor DSM (design structure matrix) and the information input time factor DSM are presented and rework risk DSM are applied to calculate project time. Furthermore, the project duration time model based-on sequential overlapping and rework time mode based-on feedback overlapping are proposed. For a case of project activity sequence optimization problem, set the project total time model based on overlapping as the objective, an optimized project is obtained by using genetic algorithms (AG). The result indicates that the project duration and the rework time are significantly reduced.