Group Decision and Negotiation

, Volume 17, Issue 3, pp 249–265 | Cite as

The Core of Consistency in AHP-Group Decision Making

  • J. M. Moreno-Jiménez
  • J. Aguarón
  • M. T. Escobar


This paper presents a new tool, the Consistency Consensus Matrix, designed to encourage the search for consensus in group decision making when using the Analytic Hierarchy Process (AHP). The procedure exploits one of the characteristics of AHP: the possibility of measuring consistency in judgement elicitation. Using two other tools, Preference Structures and Stability Intervals, we derive the Consistency Consensus Matrix that corresponds to the actor’s core of consistency. The performance analysis of the preference structure obtained from this matrix provides us with valuable information in search for knowledge. The new tool is illustrated by means of a case study adapted from a real-life experiment in e-democracy developed for the City Council of Zaragoza (Spain).


Group decision making AHP Consistency Consensus Matrix Knowledge extraction E-Democracy 


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Earlier versions of this paper have been presented in the 12th MiniEuro Conference (Brussels, April 2002) and at the Workshop on e-democracy (TED-ESF) held in Madrid (May 2003). The work has been partially funded under Research Projects “Electronic Government. Internet-based Complex Decision Making: e-democracy and e-cognocracy” (Ref. PM2004-052) and “Internet-based Complex Decision Making. Decisional Tools for e-cognocracy” (Ref. TSI2005-02511).

The authors wish to express their thanks to the referees for their helpful observations and suggestions on an earlier version of this paper. They are also grateful to Stephen Wilkins for helping with the translation of the manuscript.


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Copyright information

© Springer Science + Business Media B.V. 2007

Authors and Affiliations

  • J. M. Moreno-Jiménez
    • 1
  • J. Aguarón
    • 1
  • M. T. Escobar
    • 1
  1. 1.Facultad de EconómicasZaragozaSpain

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