The article discusses the classification and selection of objects when multiple perspectives are involved, focusing on the ELECTRE method. The method aims to derive a result relation from which to justify the elimination of a subset of objects, restricting the choice to complementary subsets or identifying a dichotomous ranking. Two indicators, "concordance" and "discordance," are introduced to introduce this result relation, based on the concept of a graph kernel. The article provides examples to justify this approach and sketches some generalizations to address more complex problems. It also discusses the notion of multidimensional states and the problems of typology and comparison, emphasizing the importance of comparing objects based on their multidimensional states. The ELECTRE method is detailed, including the indicators of concordance and discordance, and the definition of the surclassing relation. The article concludes with suggestions for further extensions and applications of the ELECTRE method.The article discusses the classification and selection of objects when multiple perspectives are involved, focusing on the ELECTRE method. The method aims to derive a result relation from which to justify the elimination of a subset of objects, restricting the choice to complementary subsets or identifying a dichotomous ranking. Two indicators, "concordance" and "discordance," are introduced to introduce this result relation, based on the concept of a graph kernel. The article provides examples to justify this approach and sketches some generalizations to address more complex problems. It also discusses the notion of multidimensional states and the problems of typology and comparison, emphasizing the importance of comparing objects based on their multidimensional states. The ELECTRE method is detailed, including the indicators of concordance and discordance, and the definition of the surclassing relation. The article concludes with suggestions for further extensions and applications of the ELECTRE method.