The Appropriateness Evaluation protocol (AEP) presents as a limiting factor, the need to do long, time-sparing, studies, which provides information of past events. As we had obtained a very good feedback from this tool, a one-day-study was done, with patients inward at the time and compared results with the other versions (preospective and restrospective AEP). Although data were not useful for stattistic study, they do presented a view of inappropriateness and its causes with a minimum investment in terms of time, thus favouring rapid and synchronic interventions to correct this parameter.