Select？on of the Most Effect？ve Contractor Company in Insulat？on Sector w？th Grey Relational Analys？s Method

In today's competitive conditions, multivariate decision problems frequently encountered by enterprises are becoming more complex. It has become necessary to solve the decision problems which have become so intrusive by using multi-criteria decision making (MCDM) methods. Objective: The aim of this study is to demonstrate the availability of MCDM methods in the solution and evaluation of decision problems encountered by the insulation sector enterprises. Although there are many studies on the selection of suppliers in the literature, there is no study of the most efficient subcontractor selection in the insulation sector. It is aimed to fill this gap in terms of scientific. Data Collection and Methodology: In the application part of the study, grey relational analysis method was used in the selection of the most effective subcontractor for a company in the insulation sector in Düzce province. The relevant data were obtained from the managers of the enterprises. They were also considered as decision-makers. Conclusion and Evaluation: As a result of the conducted decision analysis; the most effective subcontractor was A5 (Hedef Metal). The second A4 (？zdo？an Metal) and the third A3 (Hako？lu) respectively. The results of the analysis were shared with the authorities of the relevant enterprise. It is foreseen that, current methods and hybrid methods can be used by making changes in the general structure of the model for future studies