Figure 3. A minimal cost analysis (MCA) model for capacity planning of the gynecology subspecialty block on Tuesdays. Plot of operating room time used (historical surgical demand) versus the costs of actual underutilization and overutilization and the average costs of under- and overutilization estimated using the MCA strategy. The MCA budget estimate (B*) is 864 min when the ratio of overtime to regular time costs is 1.