In decision-making processes, it often occurs that the decision maker is asked to pairwise compare alternatives. His/her judgements over a set of pairs of alternatives can be collected into a matrix and some relevant properties, for instance, consistency, can be estimated. Consistency is a desirable property which implies that all the pairwise comparisons respect a principle of transitivity. So far, many indices have been proposed to estimate consistency. Nevertheless, in this paper we argue that most of these indices do not fairly evaluate this property. Then, we introduce a new consistency evaluation method and we propose to use it in group decision making problems in order to fairly weigh the decision maker’s preferences according to their consistency. In our analysis, we consider two families of pairwise comparison matrices: additively reciprocal pairwise comparison matrices and multiplicatively reciprocal pairwise comparison matrices.

Fair consistency evaluation for reciprocal relations and in group decision making / Fedrizzi, Michele; Brunelli, Matteo. - In: NEW MATHEMATICS AND NATURAL COMPUTATION (NMNC). - ISSN 1793-0057. - STAMPA. - 2009 vol. 5:2(2009), pp. 407-420. [10.1142/S1793005709001398]

Fair consistency evaluation for reciprocal relations and in group decision making

Fedrizzi, Michele;Brunelli, Matteo
2009

Abstract

In decision-making processes, it often occurs that the decision maker is asked to pairwise compare alternatives. His/her judgements over a set of pairs of alternatives can be collected into a matrix and some relevant properties, for instance, consistency, can be estimated. Consistency is a desirable property which implies that all the pairwise comparisons respect a principle of transitivity. So far, many indices have been proposed to estimate consistency. Nevertheless, in this paper we argue that most of these indices do not fairly evaluate this property. Then, we introduce a new consistency evaluation method and we propose to use it in group decision making problems in order to fairly weigh the decision maker’s preferences according to their consistency. In our analysis, we consider two families of pairwise comparison matrices: additively reciprocal pairwise comparison matrices and multiplicatively reciprocal pairwise comparison matrices.
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Fedrizzi, Michele; Brunelli, Matteo
Fair consistency evaluation for reciprocal relations and in group decision making / Fedrizzi, Michele; Brunelli, Matteo. - In: NEW MATHEMATICS AND NATURAL COMPUTATION (NMNC). - ISSN 1793-0057. - STAMPA. - 2009 vol. 5:2(2009), pp. 407-420. [10.1142/S1793005709001398]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/79167
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