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Pairwise comparison matrices and the error-free property of the decision maker

  • József TemesiEmail author
Original Paper

Abstract

Pairwise comparison is a popular assessment method either for deriving criteria-weights or for evaluating alternatives according to a given criterion. In real-world applications consistency of the comparisons rarely happens: intransitivity can occur. The aim of the paper is to discuss the relationship between the consistency of the decision maker—described with the error-free property—and the consistency of the pairwise comparison matrix (PCM). The concept of error-free matrix is used to demonstrate that consistency of the PCM is not a sufficient condition of the error-free property of the decision maker. Informed and uninformed decision makers are defined. In the first stage of an assessment method a consistent or near-consistent matrix should be achieved: detecting, measuring and improving consistency are part of any procedure with both types of decision makers. In the second stage additional information are needed to reveal the decision maker’s real preferences. Interactive questioning procedures are recommended to reach that goal.

Keywords

Decision making Pairwise comparisons Consistency Error-free matrices 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Corvinus University of BudapestBudapestHungary

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