Fixture, Gauge & Workholding Management worked example

Fixture Changeover Time at 11% setup verification and delay allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop setup verification and delay allowance to 11%, then walk the calculation through step by step. Estimate labor hours required to remove, clean, mount, locate, indicate, clamp, verify, and release fixtures during a changeover.

The inputs for this scenario

  • Fixture changeovers planned: 36 changeovers (held at the documented default)
  • Completed fixture changeovers per hour: 4 changeovers / hr (held at the documented default)
  • Setup verification and delay allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base fixture changeover time = fixture changeovers planned รท completed fixture changeovers per hour.
  • Required fixture changeover time works out to 9.99 hr at these inputs, and this is the headline figure for the scenario.
  • Base fixture changeover time works out to 9 hr at these inputs.
  • Setup verification and delay allowance works out to 11 % at these inputs.
  • Completed fixture changeovers per hour works out to 4 changeovers / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup verification and delay allowance sits at 15% and the headline result is 10.35 hr, this scenario comes in 3.48% below the baseline at 9.99 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to setup verification and delay allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a steady average changeover rate; a single very difficult fixture or a missing tool can blow past the allowance and invalidate the estimate.

Results at a glance

  • Required fixture changeover time: 9.99 hr (headline result)
  • Base fixture changeover time: 9 hr
  • Setup verification and delay allowance: 11 %
  • Completed fixture changeovers per hour: 4 changeovers / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Fixture Changeover Time calculator, set setup verification and delay allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.