The following is a guide on what the terms are and how this data is calculated:

Non-billable utilization: Total of non-billable workload (see how workload is determined here) / (divided) by max capacity

Billable utilization: Total of billable workload (see how workload is determined here) / (divided) by max capacity

Total Utilization: Total billable workload + Total Non-Billable workload / (divided) by max capacity.