Structural Engineering and Mechanics

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A multi-objective decision making model based on TLBO for the time - cost trade-off problems

  • Eirgash, Mohammad A. (Civil Engineering Department, Institute of Natural Sciences, Karadeniz Technical University) ;
  • Togan, Vedat (Civil Engineering Department, Engineering Faculty, Karadeniz Technical University) ;
  • Dede, Tayfun (Civil Engineering Department, Engineering Faculty, Karadeniz Technical University)
  • Received : 2018.09.28
  • Accepted : 2019.03.26
  • Published : 2019.07.25
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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.

Keywords

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