Strategy selection by using interval type-2 fuzzy mcdm and an application

Competitive market conditions today are becoming more challenging in every sector. Companies must determine their road maps in terms of short-, mid-, and long-term strategies. The selection of the most suitable strategy by a group of decision makers is a very complicated process. As the same linguistic expression can represent different meanings to different people the fuzzy decision-making process is a good tool to use in group decisions. Various methods and different linguistic terms are used to define fuzzy sets. In recent years, the interval type-2 fuzzy AHP and interval type-2 TOPSIS methods have been introduced in the literature. The aim of this study is to present a new strategy selection model by using group decision-making In the first step of model, criteria were determined by using Balanced Score Card. Then, criteria weights were calculated with interval type-2 fuzzy AHP. Finally, alternative strategies ordered with interval type-2 TOPSIS and the most suitable strategies for company were stated. The proposed model was applied in the strategy selection process of a large-scale public transportation company that operates in Istanbul/Turkey.