Scatter plot of booked elective cases (at T-30, T-14, T-5, and T-1) and final case volume. Linear regressions of current booked elective case count versus actual final case count for 4 illustrative days before the actual day of surgery. Even as far back as TMinus30 days, there is a clear relation between the number of booked elective cases and the final case volume on the day of surgery in the operating rooms. 95% CI and prediction interval bands are shown as dark and light areas, respectively.