Özet:

In most decision making problems, decision makers face contradictory goals. In resolving the decision-making problems in which multiple criteria exist and criteria contradict each other, multiple criteria decision-making methods are used. This study discussed the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) method, a CCCV approach that tries to identify the closest alternative to the negative ideal solution. In the first recommended case of the TOPSIS method, the distance of alternatives to the positive and negative ideal solutions is measured while the oxygen distance calculation method is used. In literature there is not much study that studies the outcome when different distance calculation methods are used in the method of TOPSIS instead of Öklid. Therefore, in this study, the use of some distance calculation methods different from the distance of the Oklid and the criteria discussed in the literature in the TOPSIS method has studied what similarity/diversity is created in the results of a decision problem solved by this method. By introducing the methods of the distance that is thought to be used in the TOPSIS method, alternative rankings formed on an example application were given, the best decision alternative was not changed, but there were differences in the ranking of decision alternatives. The results show that the alternative decisions found using different distance calculation techniques in the TOPSIS method can be supported by the presentation to decision makers to make more consistent and meaningful decisions.

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