Industrial Cleaning, Washing & Parts Cleanliness worked example

Cleanliness Inspection Workload at 22% retest and reporting allowance: a worked example

Suppose retest and reporting allowance falls to 22%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate inspection time for parts cleanliness samples, particle counts, residue tests, or visual cleanliness checks.

The inputs for this scenario

  • Cleanliness samples or checks: 64 samples (held at the documented default)
  • Cleanliness inspection rate: 0.22 samples / min (held at the documented default)
  • Retest and reporting allowance: 22 % (the input this scenario stresses; the baseline uses 30)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base cleanliness inspection time = cleanliness samples or checks รท cleanliness inspection rate.
  • Required cleanliness inspection time works out to 355 min at these inputs, and this is the headline figure for the scenario.
  • Base cleanliness inspection time works out to 291 min at these inputs.
  • Retest and reporting allowance works out to 22 % at these inputs.
  • Cleanliness inspection rate works out to 0.22 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where retest and reporting allowance sits at 30% and the headline result is 378 min, this scenario comes in 6.15% below the baseline at 355 min.
  • It divides the number of samples by the inspection rate to get base minutes, then scales that by a retest-and-reporting allowance for the total required time. 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

  • Required cleanliness inspection time: 355 min (headline result)
  • Base cleanliness inspection time: 291 min
  • Retest and reporting allowance: 22 %
  • Cleanliness inspection rate: 0.22 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Cleanliness Inspection Workload calculator, set retest and reporting allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.