Özet:

In decision making problems, when multiple criteria are evaluated together, it is aimed to choose the most suitable alternative from possible solutions. Investors who want to make big-scale decisions in today's conditions have to make the best choice by evaluating more than one factor together to maintain their assets in the target market and to provide maximum benefit. If this decision is taken for facility location selection, the investor must choose the region that will provide maximum benefit to the company during the investment period. These types of problems, called multi-criteria decision making, can be solved with a large number of different techniques and provide great benefits to decision makers. In this study; it is aimed to make the right decision for facility location selection by using the interval type 2 fuzzy TOPSIS method for a firm that will invest in the manufacturing sector. In order to achieve this, the criteria set out are taken together with all the economic, technical, cultural and social factors that the investor might actually encounter. Specified ten criteria are evaluated for three different investment regions and it is decided that the most appropriate region for investment is the Marmara region.

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