Standardized measures allow for comparison between facilities. This article describes the development of a “Core Measures Set” that should be measured and reported in surgical care in the context of the "Improving quality and patient SAFEty in surgical care through STandardisation and harmonization of perioperative care in Europe" (SAFEST) project. Subject-matter experts and patients agreed on 85 measures. The three most important measures were: (1) availability of equipment to administer oxygen to all patients requiring procedural sedation by anesthesiologists, (2) presence of an up-to-date preoperative medication list in the clinical records, and (3) documented internal policy defining resuscitation is available to all care providers.