Dynamic priority rule-based forward-backward heuristic algorithm for resource levelling problem in construction project

Lihua He and Lianying Zhang
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Lihua He: 1] Tianjin University, Tianjin, PR China[2] China University of Petroleum, Qingdao City, PR China
Lianying Zhang: Tianjin University, Tianjin, PR China

Journal of the Operational Research Society, 2013, vol. 64, issue 8, 1106-1117

Abstract: Resource levelling aims at minimizing the fluctuation of resource usage, which is accomplished by shifting non-critical activities within their float according to some heuristic rules. Most of these rules adopted a unidirectional scheduling based on a static priority rule. In this paper, we propose a dynamic priority rule-based forward-backward heuristic algorithm (FBHA). The FBHA optimizes resource allocation by shifting non-critical activities within their forward free float (FFF), forward total float (FTF) and backward free float (BFF), successively. A project is divided into several phases during each forward/backward scheduling module. In each phase, the shifting sequence and days of non-critical activities depend on a dynamic priority rule set. The FBHA is integrated into the Microsoft Project 2007 commercial software package to improve the performance of the software and facilitate the project planners. One example is analysed to illustrate the iteration process of the proposed FBHA. Another example with multiple precedence constraints is used to demonstrate the effectiveness of the proposed FBHA in complicated construction projects.

Date: 2013
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