基于依赖结构矩阵的项目规划模型

Project scheduling model based on dependency structure matrix

建立了基于依赖结构矩阵的项目规划模型。在该模型中,采用工序关系依赖结构矩阵来描述工序间的顺序、并行、搭接和时间窗口式依赖等关系;采用概率依赖结构矩阵来描述工序在执行过程中由于不确定因素影响而引起的返工循环特性,并考虑了工序在返工时的学习性。在这些工序关系和返工循环特性情况下,给出了应用平行离散事件模拟仿真方法计算项目工期的步骤,求得的项目工期分布结果可为管理者确定合理项目工期提供决策依据。最后,通过一个算例说明了模型的应用过程。

A project scheduling model based on Dependency Structure Matrix （DSM） was proposed. In this model, activity relationship DSM was employed to describe the sequential, parallel, overlapping and time--window constraint--dependent relationships among activities, an activity probability DSM was used to describe rework and iteration during activity execution due to uncertain factors, and the activity learning ability was also taken into consideration. Moreover, procedures were provided when parallel discrete events--based simulation method was used to cal- culate project period under the condition of activity relationships and rework, and the calculated results of project period distribution were helpful to decide reasonable project period. Finally, a case study was introduced to demonstrate the application of the proposed model.