An equitable approach to the payment scheduling problem in project management

An equitable approach to the payment scheduling problem in project management

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Article ID: iaor20011748
Country: Netherlands
Volume: 127
Issue: 2
Start Page Number: 262
End Page Number: 278
Publication Date: Dec 2000
Journal: European Journal of Operational Research
Authors: ,
Keywords: heuristics
Abstract:

This study reports on a new approach to the payment scheduling problem. In this approach, the amount and timing of the payments made by the client and received by the contractor are determined so as to achieve an equitable solution. An equitable solution is defined as one where both the contractor and the client deviate from their respective ideal solutions by an equal percentage. The ideal solutions for the contractor and the client result from having a lump sum payment at the start and end of the project, respectively. A double-loop genetic algorithm is proposed to solve for an equitable solution. The outer loop represents the client and the inner loop the contractor. The inner loop corresponds to a multi-mode resource-constrained project scheduling problem with the objective of maximizing the contractor's net present value for a given payment distribution. When searching for an equitable solution, information flows between the outer and inner loops regarding the payment distribution over the event nodes and the timing of these payments. An example problem is solved and analyzed. A set of 93 problems from the literature are solved and some computational results are reported.

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