The History and Future of PROMETHEE

Decision-making rarely involves the evaluation of a decision on a single criterion. On the contrary, decisions involve multiple criteria that very often may involve dimensions that are not easily quantified and moreover could include alternatives that have conflicting objectives. As a result, the field of Decision Support emerged with the purpose of assisting decision-makers to structure their problems and formalize the process on which the final decision will be based. The purpose of the chapter is to present one of the well-known decision aid methods: PROMETHEE. In the following pages, the method is presented starting from its mathematical foundation. Furthermore, the latest research trends and software applications are illustrated while finally, future research directions are explained and discussed.