Industrial Cleaning, Washing & Parts Cleanliness worked example

Cleanliness Inspection Workload at 35% retest and reporting allowance: a worked example

What does the result look like when retest and reporting allowance reaches 35%? The full calculation is worked below with real intermediate numbers. Use it when quality teams need to staff cleanliness inspection before shipment, PPAP, validation, or process release.

The inputs for this scenario

  • Cleanliness samples or checks: 64 samples (unchanged)
  • Cleanliness inspection rate: 0.22 samples / min (unchanged)
  • Retest and reporting allowance: 35 % (raised for this scenario; the documented default is 30)

Working through the calculation

  • Applying the documented formula (Base cleanliness inspection time = cleanliness samples or checks รท cleanliness inspection rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 393 min for required cleanliness inspection time, the number this scenario is built around.
  • At this operating point the engine returns 291 min for base cleanliness inspection time.
  • At this operating point the engine returns 35 % for retest and reporting allowance.
  • At this operating point the engine returns 0.22 pieces / min for cleanliness inspection rate.

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 3.85% above the baseline at 393 min.
  • A figure at this level is achievable when retest and reporting allowance is genuinely sustained, not just peaked for a shift. It assumes a steady inspection rate and a single technician's throughput; it does not model queueing, equipment availability, or the long fixed setup of methods like extraction-and-filtration.

Results at a glance

  • Required cleanliness inspection time: 393 min (headline result)
  • Base cleanliness inspection time: 291 min
  • Retest and reporting allowance: 35 %
  • Cleanliness inspection rate: 0.22 pieces / min

Run it with your numbers

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

Last reviewed 2026-05-12.