Fastening, Torque & Joint Assembly worked example

Rivet Cycle Time at 7.2% handling, check, and rework allowance: a worked example

Suppose handling, check, and rework allowance falls to 7.2%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate riveting operation hours from rivets to set, accepted rivets per hour, and allowance for handling, checks, and rework.

The inputs for this scenario

  • Rivets to set: 1,800 rivets (held at the documented default)
  • Accepted rivets set per hour: 420 rivets / hr (held at the documented default)
  • Handling, check, and rework allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base riveting time = rivets to set รท accepted rivets set per hour.
  • Required rivet cycle hours works out to 4.59 hr at these inputs, and this is the headline figure for the scenario.
  • Base riveting hours works out to 4.29 hr at these inputs.
  • Rivet handling/check allowance works out to 7.2 % at these inputs.
  • Accepted rivet setting rate works out to 420 rivets / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where handling, check, and rework allowance sits at 10% and the headline result is 4.71 hr, this scenario comes in 2.55% below the baseline at 4.59 hr.
  • It computes the labor hours to set a quantity of rivets at an accepted-rivets-per-hour rate, padded by a handling, check, and rework allowance. 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 rivet cycle hours: 4.59 hr (headline result)
  • Base riveting hours: 4.29 hr
  • Rivet handling/check allowance: 7.2 %
  • Accepted rivet setting rate: 420 rivets / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Rivet Cycle Time calculator, set handling, check, and rework allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.