It is a tool for monitoring the compilation of the Safety Surgery Check List (SSCL) in surgical practice.Years after the implementation of the SSCL in Emilia Romagna, it is appropriate to verify the effective adherence of the surgical teams to the correct application of the checklist in the operating room. The method identified for this purpose is that of direct observation thanks to data collection through the ObsERvare app. The information collected by this app flows into the regional database which allows active surveillance and immediate information feedback on the results.Access to the application is reserved for authorized users. To request access, contact the Risk Manager of your companyATTENTION: This app replaces the previous one, "OssERvare" (https://play.google.com/store/apps/details?id=it.regione.emilia_romagna.OssERvare)