Cleanroom & Contamination Control worked example

Cleanroom Utilization at 86% target cleanroom utilization: a worked example in cleanroom & contamination control

What does the result look like when target cleanroom utilization reaches 86%? The full calculation is worked below with real intermediate numbers. a team needs to identify underused rooms, schedule congestion, or justified expansion needs for a cleanroom utilization period

The inputs for this scenario

  • Used cleanroom production or support hours: 510 hr (unchanged)
  • Available qualified cleanroom hours: 720 hr (unchanged)
  • Target cleanroom utilization: 86 % (raised for this scenario; the documented default is 75)

Working through the calculation

  • Applying the documented formula (Cleanroom Utilization = used cleanroom production or support hours ÷ available qualified cleanroom hours × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 70.83 % for cleanroom utilization result, the number this scenario is built around.
  • At this operating point the engine returns 15.17 points for cleanroom utilization gap to target.
  • At this operating point the engine returns 510 count for used cleanroom production or support hours.
  • At this operating point the engine returns 720 count for available qualified cleanroom hours.

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 %.
  • A figure at this level is achievable when target cleanroom utilization is genuinely sustained, not just peaked for a shift. Hours used does not distinguish productive from low-value occupancy — a room can show high utilization while running setups, requalification, or rework, so pair it with yield and output measures.

Results at a glance

  • Cleanroom Utilization result: 70.83 % (headline result)
  • Cleanroom Utilization gap to target: 15.17 points
  • Used cleanroom production or support hours: 510 count
  • Available qualified cleanroom hours: 720 count

Run it with your numbers

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

Last reviewed 2026-05-12.