An Uncertain Resource Constrained Scheduling Model Based on Uncertainty Theory
Mathematics and Computer Science
Volume 4, Issue 6, November 2019, Pages: 138-141
Received: Nov. 20, 2019;
Accepted: Dec. 16, 2019;
Published: Dec. 27, 2019
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Qian Zhang, School of Management Engineering and Business, Hebei University of Engineering, Handan, China
Xiaosheng Wang, School of Mathematics & Physics, Hebei University of Engineering, Handan, China
Wei Li, School of Mathematics & Physics, Hebei University of Engineering, Handan, China
Hao Hu, School of Management Engineering and Business, Hebei University of Engineering, Handan, China
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Resource constrained project scheduling problem is to make a schedule for minimizing of the completion time or total cost subject to precedence rules and resource constraints. Traditional resource constrained project scheduling problem research takes into account achieve management goal in certain environment. However, there are many uncertainties in practical projects due to the uncertain factors, which leads to the change of resource availability. In this paper, for better described the uncertain resource constrained project scheduling problem, we firstly consider the uncertain resource availability project scheduling problem based on uncertainty theory. To meet the manger goals, it is assumed that the increased quantities of resource are uncertain variables and the finish time of each activity is a decision variable. Then, an uncertain resource constrained model is built. The goals of the model are to minimize the completion time and the total cost which composed by the activity cost and the additional resource cost. One of the constraints is the finish-start precedence relationship among the project activities. The other constraint is the resource constraint in which the demand of resource shall not exceed the total supply of resource for each resource type at any time. Furthermore, the equivalent form of the above model is given and its equivalence is proved. Finally, a genetic algorithm is applied to search for quasi-optimal scheduling, and a project example is given to illustrate the effectiveness of the model.
Project Schedule Problem, Uncertainty Theory, Uncertain Resource
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An Uncertain Resource Constrained Scheduling Model Based on Uncertainty Theory, Mathematics and Computer Science.
Vol. 4, No. 6,
2019, pp. 138-141.
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