Cleanroom & Contamination Control worked example

Cleanroom Utilization at 54% target cleanroom utilization: a worked example in cleanroom & contamination control

Suppose target cleanroom utilization falls to 54%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate how much available cleanroom time is actually used for qualified production, monitoring, or support work.

The inputs for this scenario

  • Used cleanroom production or support hours: 510 hr (held at the documented default)
  • Available qualified cleanroom hours: 720 hr (held at the documented default)
  • Target cleanroom utilization: 54 % (the input this scenario stresses; the baseline uses 75)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cleanroom Utilization = used cleanroom production or support hours ÷ available qualified cleanroom hours × 100.
  • Cleanroom Utilization result works out to 70.83 % at these inputs, and this is the headline figure for the scenario.
  • Cleanroom Utilization gap to target works out to -16.83 points at these inputs.
  • Used cleanroom production or support hours works out to 510 count at these inputs.
  • Available qualified cleanroom hours works out to 720 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target cleanroom utilization sits at 75% and the headline result is 70.83 %, this scenario lands almost exactly on the baseline at 70.83 %.
  • It computes the percentage of available qualified cleanroom hours that were used, and the gap in percentage points to your target utilization. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Cleanroom Utilization result: 70.83 % (headline result)
  • Cleanroom Utilization gap to target: -16.83 points
  • Used cleanroom production or support hours: 510 count
  • Available qualified cleanroom hours: 720 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Cleanroom Utilization calculator, set target cleanroom utilization to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.