Cleanroom & Contamination Control worked example

Cleanroom Capacity at 63% room availability after cleaning and maintenance: a worked example

This worked example runs the cleanroom capacity numbers for a tougher week than the baseline: 63% room availability after cleaning and maintenance instead of the typical 87%. Estimate usable cleanroom production capacity after room cycles, availability, and contamination-control first-pass release yield.

The inputs for this scenario

  • Qualified lots or batches per cleanroom cycle: 2 lots / cycle (held at the documented default)
  • Available cleanroom production cycles: 120 cycles (held at the documented default)
  • Room availability after cleaning and maintenance: 63 % (the input this scenario stresses; the baseline uses 87)
  • First-pass release yield after cleanroom checks: 96 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross cleanroom capacity = qualified lots or batches per cleanroom cycle × available cleanroom production cycles.
  • Usable cleanroom capacity works out to 145 valid outputs at these inputs, and this is the headline figure for the scenario.
  • Gross cleanroom capacity works out to 240 valid outputs at these inputs.
  • Cleanroom Capacity lost to room or instrument downtime works out to 88.8 valid outputs at these inputs.
  • Cleanroom Capacity lost to invalid samples, rejects, or holds works out to 6.05 valid outputs at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where room availability after cleaning and maintenance sits at 87% and the headline result is 200 valid outputs, this scenario comes in 27.59% below the baseline at 145 valid outputs.
  • Use it for production planning, capacity commitments, and to quantify how much output is lost to downtime versus quality holds. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Usable cleanroom capacity: 145 valid outputs (headline result)
  • Gross cleanroom capacity: 240 valid outputs
  • Cleanroom Capacity lost to room or instrument downtime: 88.8 valid outputs
  • Cleanroom Capacity lost to invalid samples, rejects, or holds: 6.05 valid outputs

Run it with your numbers

  • To rerun this with your own numbers, open the live Cleanroom Capacity calculator, set room availability after cleaning and maintenance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.