【摘要】 工序机动时间特性研究是对项目进度进行科学管理的基础.针对任意工序使用机动时间是否会影响它的前、后继工序和平行工序的问题,即机动时间蔓延性问题,利用机动时间的几类时差,特别是前、后共用时差,提出了基于双代号网络计划的标值算法,证明其正确性,运用该算法量化了单个工序使用机动时间对整个网络计划的影响程度和范围,系统分析了各工序机动时间的变化规律,并修正了时间参数计算公式.更多还原

【Abstract】 The study of activity float properties is the basis of managing project schedule.Aiming at the problem that whether an arbitrary activity consuming float affects float of preceding,succeeding and parallel activities,i.e.,the problem of activity float spread property,the paper gives a mark-value algorithm based on activity-on-arc network planning and proves its correctness by applying several concepts of float,especially forward common float and back common float.By using the algorithm,the paper measures the affected degree and scope for whole network planning quantitatively and analyzes the mutation rules of each activity′s float when an arbitrary activity consumes float,and furthermore amends formulae of calculating time parameter.更多还原