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Structural Engineering and Mechanics Volume 71, Number 2, July25 2019 , pages 139-151 DOI: https://doi.org/10.12989/sem.2019.71.2.139 |
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A multi-objective decision making model based on TLBO for the time – cost trade-off problems |
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Mohammad A. Eirgash, Vedat Toğan and Tayfun Dede
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| Abstract | ||
| In a project schedule, it is possible to reduce the time required to complete a project by allocating extra resources for critical activities. However, accelerating a project causes additional expense. This issue is addressed by finding optimal set of time-cost alternatives and is known as the time-cost trade-off problem in the literature. The aim of this study is to identify the optimal set of time-cost alternatives using a multiobjective teaching-learning-based optimization (TLBO) algorithm integrated with the non-dominated sorting concept and is applied to successfully optimize the projects ranging from a small to medium large projects. Numerical simulations indicate that the utilized model searches and identifies optimal / near optimal trade-offs between project time and cost in construction engineering and management. Therefore, it is concluded that the developed TLBO-based multiobjective approach offers satisfactorily solutions for time–cost trade-off optimization problems. | ||
| Key Words | ||
| critical path method (CPM); multi objective optimization; meta-heuristic algorithm; time cost trade-off problem (TCTP); construction management | ||
| Address | ||
| Mohammad A. Eirgash: Civil Engineering Department, Institute of Natural Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey. Vedat Toğan: Civil Engineering Department, Engineering Faculty, Karadeniz Technical University, 61080 Trabzon, Turkey. Tayfun Dede: Civil Engineering Department, Engineering Faculty, Karadeniz Technical University, 61080 Trabzon | ||