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首页> 外文期刊>Journal of Construction Engineering and Management >Constraint Programming Approach to Optimizing Project Schedules under Material Logistics and Crew Availability Constraints
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Constraint Programming Approach to Optimizing Project Schedules under Material Logistics and Crew Availability Constraints

机译：物料物流和机组可用性约束下优化项目进度的约束规划方法

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摘要

With increasing implementation of off-site prefabrication and modular construction technologies, the complexity of material supply chain management on construction projects has grown substantially. However, research on construction scheduling has yet to take dynamic material logistics as an explicit constraint in analytically deriving construction schedules and addressing impacts of uncertainties in material supply on project budget. This study proposes a two-step analytical approach to tackle the identified problem. First, a constraint programming-based scheduling optimization model is developed to derive project schedules subject to variable material delivery times and finite crew resource availability. The second step is to take advantage of the valid optimization model for evaluating the impact of different input settings of material logistics on project budget. An example project adapted from the literature is used to illustrate the effectiveness of the proposed optimization model in coping with variable material delivery times. Based on the same case, the delivery date of a particular material is singled out as the risk factor of interest in order to derive the complex relationship between material delivery date and total project cost. In addition, a case study based on a bridge girder fabrication project is presented to demonstrate the applicability of the proposed optimization model on projects of practical size. In conclusion, this study adds to the body of knowledge by developing an analytical methodology that factors material supply constraints into the resource-constrained scheduling optimization model so as to analyze the impact of uncertainties in material deliveries on project budget.
机译：随着非现场预制件和模块化建筑技术的实施越来越多，建筑项目中材料供应链管理的复杂性大大增加。但是，关于施工进度计划的研究尚未将动态的物料物流作为明确的约束条件来分析得出施工进度表并解决物料供应不确定性对项目预算的影响。这项研究提出了两步分析方法来解决已发现的问题。首先，开发了一种基于约束程序的进度计划优化模型，以根据可变的物料交付时间和有限的船员资源可用性得出项目进度表。第二步是利用有效的优化模型来评估物料物流的不同投入设置对项目预算的影响。从文献改编的示例项目用于说明所建议的优化模型在应对可变材料交付时间方面的有效性。基于相同的情况，特定材料的交付日期被选为感兴趣的风险因素，以便得出材料交付日期与项目总成本之间的复杂关系。此外，还基于桥梁制造项目进行了案例研究，以证明所提出的优化模型在实际规模项目中的适用性。总之，本研究通过开发一种将物料供应约束因素纳入资源受限的调度优化模型中的分析方法，从而增加了知识体系，从而分析了物料交付不确定性对项目预算的影响。

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