Consistency stability intervals for a judgement in AHP decision support systems

This paper focuses on the need to evaluate the consistency of human judgements in decision support systems (DSS). In this sense, and in the context of one of the most applied multicriteria methodologies, the analytic hierarchy process (AHP), we obtain the consistency stability interval (CSI) associated with each judgement, that is to say, the interval in which this can oscillate without exceeding a value of the consistency measure fixed in advance. To calculate these CSIs, we consider the row geometric mean method as the priorisation procedure, the geometric consistency index as the consistency measure and a local situation with one criterion. The proposed procedure has been implemented in a module that is easily adaptable to any Decision Support System based on AHP. (C) 2002 Elsevier Science B.V. All rights reserved.