Abstract
Most decision making methods used to evaluate a system or demonstrate the weak and strength points are based on fuzzy sets and evaluate the criteria with words that are modeled with fuzzy sets. The ambiguity and vagueness of the words and different perceptions of a word are not considered in these methods. For this reason, the decision making methods that consider the perceptions of decision makers are desirable. Perceptual computing is a subjective judgment method that considers that words mean different things to different people. This method models words with interval type-2 fuzzy sets that consider the uncertainty of the words. Also, there are interrelations and dependency between the decision making criteria in the real world; therefore, using decision making methods that cannot consider these relations is not feasible in some situations. The Decision-Making Trail and Evaluation Laboratory (DEMATEL) method considers the interrelations between decision making criteria. The current study used the combination of DEMATEL and perceptual computing in order to improve the decision making methods. For this reason, the fuzzy DEMATEL method was extended into type-2 fuzzy sets in order to obtain the weights of dependent criteria based on the words. The application of the proposed method is presented for knowledge management evaluation criteria.
Highlights
Many decision making methods are being proposed to facilitate the decision making process
To improve the interrelations between decision making criteria in perceptual computing, we proposed an interval type-2 fuzzy set extension of the Decision-Making Trail and Evaluation Laboratory (DEMATEL) method
We combined the perceptual computing characteristics with the fuzzy DEMATEL in order to map the influence matrices defined by words into weights
Summary
Many decision making methods are being proposed to facilitate the decision making process. Decision making problems consist of several criteria, and each criterion is evaluated by some other subcriteria. The evaluation criteria are almost dependent based on the complexity and vagueness of the real world. Decision making methods that consider these interrelations between criteria are more desirable. The Decision-Making Trail and Evaluation Laboratory (DEMATEL) was proposed by the Battelle Memorial Institute through its Geneva Research Centre (Gabus and Fontela 1973). This method considers the causal relationships between criteria and illustrates the weights between criteria by diagraphs
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