Download PDF by Hervé Raynaud (auth.), Nadine Meskens, Marc Roubens (eds.): Advances in Decision Analysis

By Hervé Raynaud (auth.), Nadine Meskens, Marc Roubens (eds.)

The current ebook fmds its roots within the overseas convention on equipment and purposes of a number of standards determination Making held in Mons in may well 1997. A small variety of contributions to that convention have been chosen through a refereeing strategy and retained authors have been asked to incorporate of their ultimate model their newer effects. This explains why a few papers range considerably from the unique presentation. The introductory paper of Raynaud addresses the lengthy diversity forecasts in a number of standards selection Making at the foundation of a Delphi procedure that was once run sooner than and through the congress. In a moment half, the French writer explains how he and a few of his companions may possibly locate the evidence of a big conjecture : the generation of a strongly monotonic selection functionality isn't really a strongly monotonic score functionality. the second one a part of the e-book covers methodological points of choice concept. The contribution of Bouyssou and Pirlot matters the reformulation of classical conjoint dimension types that result in an entire and transitive choice binary relation at the set of choices which appear to be unrealistic while determination makers are requested to match items evaluated on a number of attributes. The authors suggest to think about non transitive, non entire and non additive decomposable conjoint versions. They outline houses that signify such models.

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E. n) = L Wj -MIIII-s (7) iel) with qjJ '5, qj2 '5, 0 (qil is a veto threshold; qi2 is an indifference threshold); s is the so-called concordance threshold, M is a "large" positive number (large enough for preventing F from being positive as soon as Ii is not empty) and Wi ' the (normalised) weight of criterion i . Using formula (5) and (6), we get the definition of the overal preference in ELECTRE I : a t b iff 1111 = 0 and Lw i ~S ;EI~ TACTIC (Vansnick 1986) is another approach which can be described by model (5)-(6) (see Bouyssou et al (1997) for more detail).

Proposition 5 For any comparison structure (X, g), Uc(MC(X,g») = MC(X, g), and MC(X, g) ~ UC CO (X, g) ~ UC(X, g). Moreover, the Minimal Covering set is Condorcet consistent. The sign-Minimal Movering set, MC± satisfies also the Strong Superset and Monotonicity properties, and is a refinement of MC : for all (X,g), MC±(X,g) = MC(X,sgn(g») ~ MC(X, g). 4 SIMPSON-KRAMER Another familiar concept in decision theory and game theory is the concept of a prudent decision (or strategy). A prudent decision is a choice which maximizes the minimal payoff.

3. So cold that the hand freezes immediately. We see that these definitions are not precise, but anyway they provide a ground for agreement. Using such definition, we have an absolutely ordinal scale with discrete estimates. Measurement is reduced to classifying objects as belonging to one of the estimates or to an interval between estimates. Two more remarks are due. It is obvious that the thus-constructed absolute ordinal scale cannot have many values; otherwise, they will be poorly distinguishable by the measurement makers.

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