《CEM_Time-Cost-Quality Trade-Off Analysis for Highway Construction》.pdf

Time-Cost-Quality Trade-Off Analysis for Highway Construction Khaled El-Rayes, M.ASCE,1 and Amr Kandil, A.M.ASCE2 Abstract: Many departments of transportation have recently started to utilize innovative contracting methods that provide new incentives for improving construction quality. These emerging contracts place an increasing pressure on decision makers in the construction industry to search for an optimal resource utilization plan that minimizes construction cost and time while maximizing its quality. This paper presents a multiobjective optimization model that supports decision makers in performing this challenging task. The model is designed to transform the traditional two-dimensional time-cost tradeoff analysis to an advanced three-dimensional time-cost-quality trade-off analy- sis. The model is developed as a multiobjective genetic algorithm to provide the capability of quantifying and considering quality in construction optimization. An application example is analyzed to illustrate the use of the model and demonstrate its capabilities in generating and visualizing optimal tradeoffs among construction time, cost, and quality. DOI: 10.1061/ASCE0733131:4477 CE Database subject headings: Information technology IT; Algorithms; Highway construction; Cost control; Contracts; Construction industry. Introduction reduce construction duration Jaraiedi et al. 1995; 3 nighttime construction that seeks to cut service disruption and project time Existing networks of highways and roads are aging and deterio- by requiring contractors to work during off-peak nighttime h