基于随机活动工期的现金流动态均衡前摄性与反应性项目调度优化

Proactive and Reactive Cash Flow Dynamically Balanced Project Scheduling Optimization Based on Random Activities Durations

承包商的现金流动态均衡对不确定条件下项目的顺利实施有重要影响。作者研究基于随机活动工期的现金流动态均衡前摄性及反应性项目调度问题,目标是在随机活动工期条件下,为承包商生成现金流均衡基准进度,并根据执行过程中的实际情况,动态地对其进行反应性调整。首先,通过建立前摄性调度优化模型生成基准进度,并提出两个反应性调度策略对其进行调整。其次,为以上诸模型的求解设计了模拟退火和禁忌搜索相结合的混合算法tabu-SA。最后,针对前摄性调度模型,在随机生成的算例集合上对算法进行测试,并进行大规模仿真实验。研究结果可以为随机活动工期下承包商保持现金流动态均衡、确保项目顺利实施,提供定量化决策支持。

It is important to implement projects successfully and smoothly,the contractors’cash flow of which is balanced in uncertain circumstances.The authors study proactive and reactive cash flow balanced project scheduling problem based on random duration of activities.The purpose of this paper is to generate a baseline schedule for the contractor and to adjust it dynamically during the project executing process.The proactive scheduling optimization model is constructed and then the authors provide two reactive optimization models to adjust the baseline schedule.Further,a hybrid algorithm,tabu-SA,is developed to solve the studied problem.Ultimately,for the proactive scheduling model,experiment is conducted on the standard project instances set and further large scale reactive simulations are performed on each instance.The research could provide decision supports for the contractors to ensure cash flow to be balanced in the environments with random activities duration.