Aerospace & Defense Manufacturing worked example

Space Cleanliness Inspection Load at 40% re-clean and documentation allowance: a worked example

This worked example runs the space cleanliness inspection load numbers for a tougher week than the baseline: 40% re-clean and documentation allowance instead of the typical 55%. Estimate inspection hours for space hardware cleanliness verification from inspected surfaces or units, inspection pace, and re-clean allowance.

The inputs for this scenario

  • Space hardware cleanliness checks: 68 checks (held at the documented default)
  • Cleanliness inspection pace: 1.1 checks/min (held at the documented default)
  • Re-clean and documentation allowance: 40 % (the input this scenario stresses; the baseline uses 55)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base cleanliness inspection time = cleanliness checks รท inspection pace.
  • Space cleanliness inspection load works out to 86.55 cleanliness hr at these inputs, and this is the headline figure for the scenario.
  • Base cleanliness inspection time works out to 61.82 cleanliness hr at these inputs.
  • Re-clean and documentation allowance works out to 40 % at these inputs.
  • Cleanliness inspection pace works out to 1.1 checks/min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where re-clean and documentation allowance sits at 55% and the headline result is 95.82 cleanliness hr, this scenario comes in 9.68% below the baseline at 86.55 cleanliness hr.
  • Use it when planning cleanroom staffing or a contamination-verification window for a hardware build, integration, or pre-ship inspection. 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

  • Space cleanliness inspection load: 86.55 cleanliness hr (headline result)
  • Base cleanliness inspection time: 61.82 cleanliness hr
  • Re-clean and documentation allowance: 40 %
  • Cleanliness inspection pace: 1.1 checks/min

Run it with your numbers

  • To rerun this with your own numbers, open the live Space Cleanliness Inspection Load calculator, set re-clean and documentation allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.