箭线式网络图时间参数的计算技巧

Computing skills of arrow network diagram time parameters

通过实例阐述箭线式网络中结点时间参数、工序时间参数、总时差、单时差和关键路线的概念、计算公式和求解步骤,重点对结点时间参数和单时差的计算过程进行说明,并对计算技巧进行总结:计算结点时间参数时,应考虑某一结点对应的箭尾或箭头的数量;计算工序时间参数时,应先计算最早可能开工时间和最迟必须完工时间;由于单时差是两道相邻工序时间参数的差值,因此在计算某工序的单时差时,需要考虑其紧后工序的最早可能开工时间。

Through examples explain the concept of AOA network node time parameters, process time parameters, total float, single jet lag and key routes, formulas and solving steps .Focus on the calculation of a single node time parameters and the time difference is explained .When calculating the node time parameters： computational techniques and summarize. You should consider a number of the corresponding node or arrow nock. When calculating process time parameters;you should first calculate the earliest possible start time and must be completed no later than the time. Since single difference is the difference between two adjacent process time parameters. Therefore, when computing the time difference of a single process, after tightening process needs to consider its earliest possible start time.