An International Workshop on Multicriteria Decision Analysis (MCDA) was organized on May 15, 2017. The event was organized by NATS-National Institute of Cardiology and included the participation of João Bana e Costa, an engineer who carried out a practical office as M-Macbeth software. The method is promising and has been studied by NATS to support complex decisions. Members of NATS of IFF, INTO, INC and DGITS Ministério da Saúde are present.