Abstract:
Evaluating and selecting the right contractors can increase the chances of success of a project and the organization. Considering the intense competition faced by organizations today, proper cost management to enhance profitability and customer satisfaction has attracted a lot of attention. The evaluation of contractors is usually a process thatis based on various criteria.By the end of it, theappropriate options are selected. Given the diversity in the criteria and among thedecision-making subjects, no singleway has been offered to suggest substitution between criteria.The desirability indifference on the curve ofconsumption of various goods (selection ofdecision-making options) are the same. This paper seeks to identify parallel matrices with the initial decision-making matrix of contractors that have the same results and desirability for decision-makers (indifference points). At first, the initial rating using the AHP and TOPSIS methods andthe particle swarm optimization (PSO) and genetic algorithm (GA)techniques, along withMATLAB software,was used to identify theparallel matrices. According to the obtained results, sixparallel matrixes with the initial decision-making matrix that had been prepared by experts fromthe company were produced.Out of them, the matrix related to The point of indifference is the fifth output5 AHP-PSO, based on the company experts' opinions was selected as the final version.
Machine summary:
Indifferent Points in The Multicriteria Decision Making Problems (A Case Study of Suppliers’ Evaluation in Zanjan Province Gas Company) Arshad Farahmandiana, Reza Radfar*b, Mohammad Ali Afshar Kazemic a Ph. D.
c Department of Industrial Management, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Despite the problems in determining the utility function, even in simple cases, it has the advantage that, if correctly identified, by solving the model, it can be assumed that the maximum satisfaction and desirability for the decision maker has been achieved.
Table 1: initial decision making matrix {مراجعه شود به فایل جدول الحاقی} accomplished as a case study regarding the evaluation of contractors of a gas company in Zanjan province, first, a primary matrix of decision-making involving10 company experts was prepared according to eight criteria (C1: standards, C2:financial stability, C3:company records, C4:quality, C5:customer satisfaction and Good record, C6:skilled manpower, C7:company structure, C8: technical equipment).
{مراجعه شود به فایل جدول الحاقی} 2-4- Data The primary matrix of the company contractors’ evaluation decision-making based on the company’s criteria and in thepresence of experts has been presented below and ranked,using AHP and TOPSIS in MATLABsoftware.
With the difference that they sought to provide a value function (utility) using the UTA method, the present research seeks to identify the points of indifference in decision-making issues.
The lack of scientific resources regarding the calculation of the final rate of succession of several commodities / methods and the combination of the model of indifference curves and the multi-criteria curriculum and the conservatism of experts in providing quantitative information on hospital purchases have been the main constraints of this study.