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**Monte Carlo simulation techniques for group decision making with incomplete information.**
*(English)*
Zbl 1102.90352

Summary: We deal with group decision-making problems where several decision makers elicit their own preferences separately. The decision makers’ preferences are quantified using a decision support system, which admits incomplete information concerning the decision makers’ responses to the questions they are asked. Consequently, each decision maker proposes classes of utility functions and attribute weight intervals for the different attributes. We introduce an approach based on Monte Carlo simulation techniques for aggregating decision maker preferences that could be the starting point for a negotiation process, if necessary. The negotiation process would basically involve the decision maker tightening the imprecise component utilities and weights to output more meaningful results and achieve a consensus alternative. We focus on how attribute weights and the component utilities associated with a consequence are randomly generated in the aggregation process taking into account the decision-makers’ preferences, i.e., their respective attribute weight intervals and classes of utility functions. Finally, an application to the evaluation of intervention strategies for restoring a radionuclide contaminated lake illustrates the usefulness and flexibility of this iterative process.

### Keywords:

decision analysis; group decisions and negotiations; multiple criteria analysis; decision support system; additive multi-attribute utility model### Software:

MOIRA
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\textit{A. Mateos} et al., Eur. J. Oper. Res. 174, No. 3, 1842--1864 (2006; Zbl 1102.90352)

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