鲁棒性项目调度中缓冲设置方法

Buffer management in robust project scheduling

研究应对不确定因素的鲁棒性项目调度,针对其所用时间缓冲区技术中的两种重要方法——集中缓冲和STC(starting time criticality)分散缓冲,采用仿真模拟实验,以项目管理库中的帕特森例1为对象,进行详细的比较研究.研究结果表明,分散缓冲法具有更好的解鲁棒性;当活动时间的不确定性程度较大时,集中缓冲法的质量鲁棒性较好;当项目工期较紧时,分散缓冲法具有更好的鲁棒性.这些研究结论为管理者在特定的项目环境下选择合适的缓冲方法提供了决策依据.

The robust project scheduling dealing with project uncertainties is studied. A simulation experiment with the project of Patterson 1 in project scheduling problem library（PSPLIB） is set up to compare two important methods of time buffering technology in robust project scheduling： Critical Chain centralized buffer and starting time criticality（STC） scattered buffer. The experiment results show that, the scattered buffer method always acts well in solution robustness. The larger the uncertainty of activity time is, the better the centralized buffer method in quality robustness will be. When the project deadline is very tight, the scattered buffer method is preferred in both kinds of robustness. These research conclusions provide decision supports for managers to choose the appropriate buffer method in the specific environment.