基于遗传算法的BT项目分包商选择模型

为控制BT项目分包商随机完工时间风险,研究在满足BT项目效益和子项目逻辑关系约束的条件下,使项目完工概率最大的分包商选择问题.基于总承包人收益最大对分包人工期的激励决策,基于计划评审法描述各子项目逻辑关系约束,在计划评审法的基础上引入遗传算法对问题进行求解,最后通过实例计算分析关键线路及对应分包商的选择,研究结果为随机情况下的施工项目分包商挑选问题提供了一种有效的管理工具.

Model of Selecting Subcontractor of BT Project Based on PERT-Embedded Genetic Algorithm

To control the competition risk of a Build-Transfer project of subcontractor, of which the time to complete its subprojects is stochastic, the problem of partner selection is studied to maximize the completion probability of the project that is constrained by benefit of BT project and the precedence of its subprojects. Firstly, make a prompting policy on consruction period to subcontractor, describing on the basis of program evaluation and review technique, then, a PERT-embedded genetic algorithm is designed to solve the problem. Finaly, calculating the critical path and select subcontractor by example, the reaseach result provide a effective management implement for selecting subcontractor of BT project in stochastic cases.