Utilization shows how much of each stage's capacity the exact output uses.
Prep utilization
Prep utilization is 2/3.
Prep util=2/3
Pack utilization
Pack utilization is 1. Interpretation: the bottleneck is fully used.
Pack util=1
Ship utilization
Ship utilization is 1/2.
Ship util=1/2
Utilization note
Utilization compares flow with capacity. It is not a wait-time or quality measure.
flow divided by capacity