Hu Wenfa, He Xinhua
School of Economics and Management, Tongji University, Shanghai 200092, China.
School of Economics Management, Shanghai Maritime University, Shanghai 201306, China.
ScientificWorldJournal. 2014 Jan 30;2014:673248. doi: 10.1155/2014/673248. eCollection 2014.
The time, quality, and cost are three important but contradictive objectives in a building construction project. It is a tough challenge for project managers to optimize them since they are different parameters. This paper presents a time-cost-quality optimization model that enables managers to optimize multiobjectives. The model is from the project breakdown structure method where task resources in a construction project are divided into a series of activities and further into construction labors, materials, equipment, and administration. The resources utilized in a construction activity would eventually determine its construction time, cost, and quality, and a complex time-cost-quality trade-off model is finally generated based on correlations between construction activities. A genetic algorithm tool is applied in the model to solve the comprehensive nonlinear time-cost-quality problems. Building of a three-storey house is an example to illustrate the implementation of the model, demonstrate its advantages in optimizing trade-off of construction time, cost, and quality, and help make a winning decision in construction practices. The computational time-cost-quality curves in visual graphics from the case study prove traditional cost-time assumptions reasonable and also prove this time-cost-quality trade-off model sophisticated.
时间、质量和成本是建筑工程项目中三个重要但相互矛盾的目标。由于它们是不同的参数，对项目经理来说，优化它们是一项艰巨的挑战。本文提出了一个时间-成本-质量优化模型，使管理人员能够对多目标进行优化。该模型源自项目分解结构方法，在该方法中，建设项目中的任务资源被划分为一系列活动，进而细分为建筑劳动力、材料、设备和管理。建设活动中使用的资源最终将决定其建设时间、成本和质量，最终基于建设活动之间的相关性生成一个复杂的时间-成本-质量权衡模型。该模型应用遗传算法工具来解决综合非线性时间-成本-质量问题。以建造一栋三层房屋为例来说明该模型的实施过程，展示其在优化建设时间、成本和质量权衡方面的优势，并有助于在建设实践中做出制胜决策。案例研究中直观图形化的计算时间-成本-质量曲线证明了传统成本-时间假设的合理性，也证明了这个时间-成本-质量权衡模型的复杂性。
