Robustness in Operations Research/Decision Aid is often associated with min–max and min–max regret criteria. This common approach to determine robust solutions consists in finding a solution which minimizes the maximal cost or regret. Nevertheless, these criteria are known to be too...

The COVID-19 crisis had a major impact on the measurement of inflation around the world, as price observation in shops became impossible and some markets completely closed down. This article looks at the measures taken during the crisis in 2020 to ensure the continued compilation of the European...

In many outranking methods, the alternatives are first compared pairwise to build a valued outranking relation, which is then exploited to derive a recommendation for the decision maker. This paper proposes extensions of Arrow and Raynaud's prudence principle to exploit a valued outranking...