An integrated fuzzy-grey based approach to group decision making problem for a wagon company

Article type: Research Article

Authors: Çelebi, Numan | Selvi, İhsan Hakan

Affiliations: Department of Industrial Engineering, Istanbul University, Avcilar, Istanbul, Turkey | Department of Information Systems Engineering, Sakarya University, Sakarya, Turkey

Note: [] Corresponding author. Numan Çelebi, Department of Industrial Engineering, Istanbul University, Avcilar, Istanbul 34320, Turkey. Tel.: +90 212 473 70 46/17750; Fax: +90 212 473 72 81; E-mail: ncelebi@istanbul.edu.tr

Abstract: Supplier Evaluation and Selection (SES) is one of the most crucial issues for many companies because of its strategic importance. Over the years a number of approaches have been presented to SES problems. SES problems are multi-criteria decision making problem involving both quantitative and qualitative criteria. Decision makers' (DMs) preferences on alternative supplier or on the criteria are often uncertain. So SES problems become more difficult. In order to overcome this difficulty, a Fuzzy-Grey based approach is suggested in this paper. We combined the favorable sides of Grey System Theory's (GST) power of mathematical analysis and Fuzzy Set's (FS) power of pointing out uncertainty for the sake of processing the uncertainty information. As the empirical study, a practical application proceeded for a leading wagon company in Turkey. A real numerical example is used to clarify the suggested approach and comparison results are presented with conclusion.

Keywords: Supplier selection, fuzzy set, grey system theory

DOI: 10.3233/IFS-120744

Journal: Journal of Intelligent & Fuzzy Systems, vol. 26, no. 1, pp. 353-365, 2014