An International Workshop on Multi-criteria Decision Analysis (MCDA) was organized on May 15, 2017. The event was organized by NATS-National Institute of Cardiology and counted on the participation of João Bana e Costa, an engineer who carried out a practical workshop with the M-Macbeth software. The method is promising and has been studied by NATS to support complex decisions. Members of NATS from IFF, INTO, INC and DGITS Ministry of Health were present.