Sprecher, Arno; Hartmann, Sönke; Drexl, Andreas An exact algorithm for project scheduling with multiple modes. (English) Zbl 0885.90059 OR Spektrum 19, No. 3, 195-203 (1997). Summary: We consider an extension of the classical resource-constrained project scheduling problem (RCPSP), which covers discrete resource-resource and time-resource tradeoffs. As a result a project scheduler is permitted to identify several alternatives or modes of accomplishment for each activity of the project. The solution procedure to be presented is a considerable generalization of the branch-and-bound algorithm proposed by Demeulemeester and Herroelen, which is currently the most powerful method for optimally solving the RCPSP. More precisely, we extend their concept of delay alternatives by introducing mode alternatives. The basic enumeration scheme is enhanced by dominance rules which increase the performance of the algorithm. We then report on our computational results obtained from the comparison with the most rapid procedure reported in the literature. Cited in 43 Documents MSC: 90B35 Deterministic scheduling theory in operations research Keywords:resource-constrained project scheduling; branch-and-bound PDF BibTeX XML Cite \textit{A. Sprecher} et al., OR Spektrum 19, No. 3, 195--203 (1997; Zbl 0885.90059) Full Text: DOI OpenURL References: [1] Bartusch M, Möhring RH, Radermacher, FJ (1988) Scheduling project networks with resource constraints and time windows. Ann Oper Res 16:201–240 · Zbl 0693.90047 [2] Boctor FF (1993) Heuristics for scheduling projects with resource restrictions and several resource-duration modes. Int J Prod Res 31:2547–2558 [3] Brucker P, Schoo A, Thiele O (1996) A branch-and-bound algorithm for the resource-constrained project scheduling problem. 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