Abstract
Supply chain presents a very complex field involving a large number of participants. The aim of the complete supply chain is finding an optimum from the aspect of all participants, which is a rather complex task. In order to ensure optimum satisfaction for all participants, it is necessary that the beginning phase consists of correct evaluations and supplier selection. In this study, the supplier selection was performed in the construction company, on the basis of a new approach in the field of multi-criteria model. Weight coefficients were obtained by DEMATEL (Decision Making Trial and Evaluation Laboratory) method, based on the rough numbers. Evaluation and the supplier selection were made on the basis of a new Rough EDAS (Evaluation based on Distance from Average Solution) method, which presents one of the latest methods in this field. In order to determine the stability of the model and the applicability of the proposed Rough EDAS method, an extension of the COPRAS and MULTIMOORA method by rough numbers was also performed in this study, and the findings of the comparative analysis were presented. Besides the new approaches based on the extension by rough numbers, the results are also compared with the Rough MABAC (MultiAttributive Border Approximation area Comparison) and Rough MAIRCA (MultiAttributive Ideal-Real Comparative Analysis). In addition, in the sensitivity analysis, 18 different scenarios were formed, the ones in which criteria change their original values. At the end of the sensitivity analysis, SCC (Spearman Correlation Coefficient) of the obtained ranges was carried out, confirming the applicability of the proposed approaches.
Highlights
Supplier selection, according to Soheilirad et al [1], presents a very important issue in decision making about management, and assumes several qualitative and quantitative criteria
This paper has developed a new approach using the advantages of rough numbers and the Evaluation based on Distance from Average Solution (EDAS) method
Evaluation of the rough numbers (RN)(PDA) value for the Expenses type of the criteria is performed in the same way, except that at the beginning, it is necessary to define the deviation of the average solution from the alternative value of the criteria discussed in Equation (27)
Summary
Supplier selection, according to Soheilirad et al [1], presents a very important issue in decision making about management, and assumes several qualitative and quantitative criteria. The importance of this process in companies is reflected through establishing the final price of the product. Supplier selection is one of the important tasks for the management of the supply [4]. Taking into account the fact that supplier selection in the supply chain is a group decision made based on several criteria, according to Zolfani et al [6], Symmetry 2017, 9, 279; doi:10.3390/sym9110279 www.mdpi.com/journal/symmetry
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