Eyewear, Lenses & Vision Products worked example

Final Inspection Workload at 16% recheck and documentation allowance: a worked example in eyewear, lenses & vision products

This worked example runs the final inspection workload numbers for a tougher week than the baseline: 16% recheck and documentation allowance instead of the typical 22%. Estimate final inspection hours for lenses or finished pairs using inspection count, inspection throughput, and review allowance.

The inputs for this scenario

  • Lenses or finished pairs to inspect: 520 items (held at the documented default)
  • Final inspection throughput: 65 items / hr (held at the documented default)
  • Recheck and documentation allowance: 16 % (the input this scenario stresses; the baseline uses 22)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base final inspection hours = lenses or finished pairs to inspect รท final inspection throughput.
  • Required final inspection workload hours works out to 9.28 hr at these inputs, and this is the headline figure for the scenario.
  • Base final inspection hours works out to 8 hr at these inputs.
  • Recheck and documentation allowance works out to 16 % at these inputs.
  • Final inspection throughput works out to 65 items / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where recheck and documentation allowance sits at 22% and the headline result is 9.76 hr, this scenario comes in 4.92% below the baseline at 9.28 hr.
  • Use it to staff the final-inspection bench for a shift, plan overtime, or check whether a volume spike can be cleared in the hours available. 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

  • Required final inspection workload hours: 9.28 hr (headline result)
  • Base final inspection hours: 8 hr
  • Recheck and documentation allowance: 16 %
  • Final inspection throughput: 65 items / hr

Run it with your numbers

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

Last reviewed 2026-05-12.