Case scenario consistent with lack of knowledge and psychological bias.

1) Improved on-time starts and reduced turnover times can increase OR and anesthesia group efficiency, but neither is a measure of (allocative or technical) efficiency.2,3 Suppose every Monday a service has mean ± SD of 7.2 ± 0.5 h of cases. The staffing (allocated time) should be 8 h. If reducing turnovers were to reduce the mean from 7.2 to 6.8 h, there would be no change in staffed hours, overutilized time, or efficiency.3 If the workload were 8.4 ± 0.5 h, 8-h staffing would be more efficient than 10 h.3 An equal reduction in turnovers would reduce the mean from 8.4 to 8.0 h, reduce overutilized time, and increase efficiency.2,3