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Measuring the Consensus in Group Decision by means of Qualitative Reasoning

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Roselló Saurí, LlorençMés informació
Prats Duaygues, FrancescMés informacióMés informació
Sánchez Soler, MonicaMés informacióMés informacióMés informació
Agell Jané, Núria
Document typeConference report
Defense date2009-11-09
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
This paper presents a mathematical framework to assess the consensus found among different evaluators who use ordinal scales in group decision-making and evaluation processes. This framework is developed on the basis of the absolute order-of-magnitude qualitative model through the use of qualitative entropy. As such, we study the algebraic structure induced in the set of qualitative descriptions given by evaluators. Our results demonstrate a weak, partial and semi lattice structure that in some conditions takes the form of a distributive lattice. We then define the entropy of a qualitatively-described system. This enables us, on the 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. This new approach is capable of managing situations where the assessment given by experts involves different levels of precision. In addition, when there is no consensus regarding the group decision, an automatic process assesses the effort required to achieve said consensus.
CitationRosello, L. [et al.]. Measuring the Consensus in Group Decision by means of Qualitative Reasoning. A: Conferencia de la Asociación Española para la Inteligencia Artificial. "XIII Conferencia de la Asociación Española para la Inteligencia Artificial". Sevilla: 2009, p. 157-168. 
URIhttp://hdl.handle.net/2117/7824
ISBN978-84-692-6424-9
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  • Departament de Matemàtiques - Ponències/Comunicacions de congressos [1.015]
  • GREC - Grup de Recerca en Enginyeria del Coneixement - Ponències/Comunicacions de congressos [114]
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