Fastening, Torque & Joint Assembly worked example

Joint Inspection Workload at 21% access, recording, and retest allowance: a worked example

What does the result look like when access, recording, and retest allowance reaches 21%? The full calculation is worked below with real intermediate numbers. Use it when planning visual checks, torque verification, witness marks, thread engagement checks, gasket compression checks, or final joint audits.

The inputs for this scenario

  • Fastened joints requiring inspection: 360 joints (unchanged)
  • Accepted joint inspections per hour: 55 inspections / hr (unchanged)
  • Access, recording, and retest allowance: 21 % (raised for this scenario; the documented default is 18)

Working through the calculation

  • Applying the documented formula (Base joint inspection time = joints requiring inspection รท accepted inspections per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 7.92 hr for required joint inspection hours, the number this scenario is built around.
  • At this operating point the engine returns 6.55 hr for base inspection hours.
  • At this operating point the engine returns 21 % for inspection allowance.
  • At this operating point the engine returns 55 inspections / hr for joint inspection rate.

How this compares with the baseline

  • Against the tool's baseline example, where access, recording, and retest allowance sits at 18% and the headline result is 7.72 hr, this scenario comes in 2.54% above the baseline at 7.92 hr.
  • A figure at this level is achievable when access, recording, and retest allowance is genuinely sustained, not just peaked for a shift. It assumes a steady accepted inspection rate; complex or hard-to-reach joints can vary widely from the average and break the estimate.

Results at a glance

  • Required joint inspection hours: 7.92 hr (headline result)
  • Base inspection hours: 6.55 hr
  • Inspection allowance: 21 %
  • Joint inspection rate: 55 inspections / hr

Run it with your numbers

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

Last reviewed 2026-05-12.