The present study is comparing the evaluation cards of the event, related to all the events executed in the experimental phase (363 participants) with those ones achieved in the first and second year of running phase system (321 and 180 participants), with particular reference to the emergent opinions about the five year compulsoriness of the attainment of the credits, imposed by the normative of the Ministry of Health. The analysis of the results underlines the discordance between the evaluations and the opinions expressed in the same ones. Finally, in the organization of a formative event is necessary to consider the not-measured factors that engrave on those measured ones (as the effectiveness). The effectiveness should also be measured at a distance of months, referring them to the possible applications of learned results on the working place, also considering the resistances to individual or collective change.