Title: A note on time/cost tradeoff curve generation for project scheduling with multi-mode resource availability costs

Authors: Denise Sato Yamashita, Reinaldo Morabito

Addresses: Production Engineering Department, Universidade Federal de Sao Carlos, 13565-905, Sao Carlos, SP, Brazil. ' Production Engineering Department, Universidade Federal de Sao Carlos, 13565-905, Sao Carlos, SP, Brazil

Abstract: In this note we combine two known algorithms and show how they can be used in order to generate tradeoff curves between time and cost for deterministic project scheduling problems with multiple modes and resource availability costs. The approach can handle linear and non-linear non-decreasing cost functions and it is based on the exact algorithm presented in Demeulemeester (1995) for the resource availability cost problem without multiple modes. As the problem is NP-hard, the method is computationally viable to solve only problems of a moderate size. The performance of the combined algorithm is compared to solutions generated by GAMS/CPLEX.

Keywords: project scheduling; resource availability cost; multiple modes; time-cost tradeoff curves; exact algorithm.

DOI: 10.1504/IJOR.2009.025702

International Journal of Operational Research, 2009 Vol.5 No.4, pp.429 - 444

Published online: 23 May 2009 *

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