Cleanroom & Contamination Control worked example

Pass-Through Utilization at 92% target pass-through utilization: a worked example

This scenario runs the pass-through utilization calculation on the strong side: 92% target pass-through utilization, with every other input held at its documented default. a team needs to decide whether transfer points are bottlenecks or whether added staging, scheduling, or pass-through capacity is needed for a pass-through or material airlock

The inputs for this scenario

  • Completed pass-through transfer cycles: 380 cycles (unchanged)
  • Available pass-through transfer cycles: 520 cycles (unchanged)
  • Target pass-through utilization: 92 % (raised for this scenario; the documented default is 80)

Working through the calculation

  • Applying the documented formula (Pass-Through Utilization = completed pass-through transfer cycles ÷ available pass-through transfer cycles × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 73.08 % for pass-through utilization result, the number this scenario is built around.
  • At this operating point the engine returns 18.92 points for pass-through utilization gap to target.
  • At this operating point the engine returns 380 count for completed pass-through transfer cycles.
  • At this operating point the engine returns 520 count for available pass-through transfer cycles.

How this compares with the baseline

  • Against the tool's baseline example, where target pass-through utilization sits at 80% and the headline result is 73.08 %, this scenario lands almost exactly on the baseline at 73.08 %.
  • Use it during capacity reviews, when sizing or justifying a new pass-through, or when diagnosing material-flow bottlenecks into a cleanroom. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Pass-Through Utilization result: 73.08 % (headline result)
  • Pass-Through Utilization gap to target: 18.92 points
  • Completed pass-through transfer cycles: 380 count
  • Available pass-through transfer cycles: 520 count

Run it with your numbers

  • Every input above is editable in the live Pass-Through Utilization calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.