Combinations of Resource Times

Resource Utilization (Res Util%)–The percentage of scheduled active time (when a resource should be in schedule) that a resource is busy but not out of service:

Res Util% = Tot Busy / ((Tot Sched) - (Tot OOS))

The total scheduled active time is calculated by figuring the total number of hours during which the resource is scheduled to be active during the entire simulation. For example, assume a simulation runs for two calendar days using the Standard schedule. This creates 18 hours scheduled active time and two hours out of service time (lunch breaks) for a total of 16 hours. If the total busy time for a worker is eight hours, the resource utilization is 50%.
Non-Waiting Resource Utilization (NW Util%)–The percentage of scheduled active time (when a resource should be in schedule) that a resource is busy but not waiting or out of service.

NW Util% = ((Tot Busy) - (Tot Res Wait)) / ((Tot Sched) - (Tot OOS))

If the worker in the previous example has accrued two hours waiting for another resource, then the non-waiting resource utilization is 37.50%.

It is possible to get over 100% resource utilization because overtime can cause busy time outside of the scheduled active time.