A qualitative reasoning approach to measure consensus

Llorenç Roselló, Francesc Prats, Núria Agell, Mónica Sánchez

Producción científica: Capítulo del libroCapítulorevisión exhaustiva

8 Citas (Scopus)


This chapter introduces a mathematical framework on the basis of the absolute order-of-magnitude qualitative model. This framework allows to develop a methodology to assess the consensus found among different evaluators who use ordinal scales in group decision-making and evaluation processes. The concept of entropy is introduced in this context and the algebraic structure induced in the set of qualitative descriptions given by evaluators is studied. We prove that it is a weak partial semilattice structure that in some conditions takes the form of a distributive lattice. The definition of the entropy of a qualitatively-described system enables us, on one hand, to measure the amount of information provided by each evaluator and, on the other hand, to consider a degree of consensus among the evaluation committee. The methodology presented is able of managing situations where the assessment given by experts involves different levels of precision. In addition, when there is no consensus within the group decision, an automatic process measures the effort necessary to reach said consensus.

Idioma originalInglés
Título de la publicación alojadaConsensual Processes
EditoresEnrique Herrera-Viedma, Jose Luis Garcia-Lapresta, Janusz Kacprzyk, Slawomir Zadrozny, Mario Fedrizzi, Hannu Nurmi
Número de páginas27
EstadoPublicada - 2011
Publicado de forma externa

Serie de la publicación

NombreStudies in Fuzziness and Soft Computing
ISSN (versión impresa)1434-9922


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