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JACIII Vol.11 No.8 pp. 914-921
doi: 10.20965/jaciii.2007.p0914
(2007)

Paper:

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Fuzzy Activity Network Method for Project Scheduling Under Resource Constraints

Luong Duc Long and Ario Ohsato

Nagaoka University of Technology, 1603-1 Kamitomioka Machi, Nagaoka, Niigata 940-2188, Japan

Received:
February 27, 2007
Accepted:
June 24, 2007
Published:
October 20, 2007
Creative Commons License
Keywords:
fuzzy activity network, critical chain, resource constraints, project scheduling, genetic algorithm
Abstract
In this article, a fuzzy activity network method is developed for project scheduling under resource constraints. Trapezoidal fuzzy numbers are used for estimating uncertain durations of activities, and then these fuzzy numbers are replaced by suitable crisp durations for project scheduling under resource constraints. In the next step, the critical chain is identified for determining the project duration, and uncertainties associated with activities are addressed by using feeding/project buffers to protect the project schedule from disturbances. For minimizing project duration, the proposed method considers both the suitable crisp durations and the start times of activities as decision variables. Hence, a new procedure based on genetic algorithm and priority heuristics is also developed for efficiently determining these decision variables. Furthermore, the method also considers selecting the best possible relationships between activities to minimize project duration. The proposed method using buffers makes it possible to improve project scheduling under resource constraints.
Cite this article as:
L. Long and A. Ohsato, “Fuzzy Activity Network Method for Project Scheduling Under Resource Constraints,” J. Adv. Comput. Intell. Intell. Inform., Vol.11 No.8, pp. 914-921, 2007.
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