Articlehybrid2018

Multi-project Time-cost Optimization in Critical Chain with Resource Constraints

Mohammad Javad Taheri Amiri · Farshidreza Haghighi · Ehsan Eshtehardian · Ozeair Abessi

36 citations0/0 files storedKSCE Journal of Civil Engineering

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Resource-Constrained Project Scheduling Construction Project Management and Performance Scheduling and Optimization Algorithms

Abstract

The simultaneous reduction of the project cost and time has paramount importance in today’s competitive world; however, it is necessary to balance the project time and cost because of the reduction asymmetry of the two factors in a project. How to balance the cost and time parameters in managing construction projects is also critical and there have always been some attempts made to provide different approaches to control it. Given the immense importance of considering resource constraints for project scheduling problems, and the proximity of the study conditions to the real world, resource constraints were also included. In a project, project managers need to be aware of resource constraints. As resource constraint scheduling problem is considered NP-hard, the metaheuristic models were developed in this paper in order to obtain results contributing to project managers’ decision-making. For this purpose, a non-dominated sorting genetic algorithm method was developed to optimize a time-cost trade-off problem. Furthermore, to solve a multi-project scheduling problem, the critical chain method was used. In order to evaluate the performance of the model, the developed model was first studied in a small scale and then simultaneous projects with 7, 8 and 10 tasks were planned. Because resource availability is essential in such problems, after solving the proposed model, a sensitivity analysis was performed for daily resources and the results were discussed. Results shows the ability of the proposed model and methodology to optimize the time-cost tradeoff considering resource constraints in sample problems. Solutions obtained showed that in some cases of scheduling without this algorithm, resource consumption exceeded above resource availability. After solving the model by proposed algorithm, resource allocation is implemented considering resource constraint. This model determined these resources as crucial and helped managers to control them.

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References

1996A Guide to the project management body of knowledge 2000Critical chain: the theory of constraints applied to project management 2012Multi-mode resource-constrained discrete time–cost-resource optimization in project scheduling using non-dominated sorting genetic algorithm 2007Fuzzy critical chain method for project scheduling under resource constraints and uncertainty 1999Critical Chain Project Management Improves Project Performance 2001A GA-based fuzzy optimal model for construction time–cost trade-off 2012A hybrid genetic algorithm for the discrete time–cost trade-off problem 1996Construction delay analysis techniques

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