UV Curing worked example

UV Cure Validation Sample Size at 65% inspection efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop inspection efficiency to 65%, then walk the calculation through step by step. Size a UV cure validation pull (samples per shift / lot) from production volume, sampling rate, and an inspection efficiency factor.

The inputs for this scenario

  • Production volume per shift: 2,400 parts / shift (held at the documented default)
  • Sampling rate: 5 samples / 1,000 (held at the documented default)
  • Inspection efficiency: 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw samples = production volume × sampling rate ÷ 1,000.
  • Recommended sample pull works out to 19 samples per validation at these inputs, and this is the headline figure for the scenario.
  • Raw samples works out to 12 samples at these inputs.
  • Inspection efficiency works out to 65 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where inspection efficiency sits at 90% and the headline result is 14 samples per validation, this scenario comes in 35.71% above the baseline at 19 samples per validation.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to inspection efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It sizes the pull from a flat per-thousand rate, not from a confidence/AQL table — for contractual AQL sampling, validate against an ANSI/ASQ Z1.4 plan.

Results at a glance

  • Recommended sample pull: 19 samples per validation (headline result)
  • Raw samples: 12 samples
  • Inspection efficiency: 65 %

Run it with your numbers

  • To rerun this with your own numbers, open the live UV Cure Validation Sample Size calculator, set inspection efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.