A gradient method for inconsistency reduction of pairwise comparisons matrices

08/04/2021

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by   Jean-Pierre Magnot, et al.

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We investigate an application of a mathematically robust minimization method – the gradient method – to the consistencization problem of a pairwise comparisons (PC) matrix. Our approach sheds new light on the notion of a priority vector and leads naturally to the definition of instant priority vectors. We describe a sample family of inconsistency indicators based on various ways of taking an average value, which extends the inconsistency indicator based on the "sup"- norm. We apply this family of inconsistency indicators both for additive and multiplicative PC matrices to show that the choice of various inconsistency indicators lead to non-equivalent consistencization procedures.