Measurement, Test & Control Equipment worked example

Calibration Interval Workload at 11% out-of-tolerance and rework allowance: a worked example

This worked example runs the calibration interval workload numbers for a tougher week than the baseline: 11% out-of-tolerance and rework allowance instead of the typical 15%. Estimate the total labor hours needed to complete all calibrations due within a given interval, including setup and documentation time, so you can staff your calibration lab or schedule outsourced calibration pickups.

The inputs for this scenario

  • Instruments due for calibration this cycle: 85 instruments (held at the documented default)
  • Average calibration time per instrument: 45 min / instrument (held at the documented default)
  • Out-of-tolerance and rework 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 calibration time = instruments due x average calibration time per instrument.
  • Total calibration workload (hours) works out to 2.1 hr at these inputs, and this is the headline figure for the scenario.
  • Base calibration time (hours) works out to 1.89 hr at these inputs.
  • Out-of-tolerance allowance (hours) works out to 11 % at these inputs.
  • Calibration rate (instruments/min) works out to 45 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where out-of-tolerance and rework allowance sits at 15% and the headline result is 2.17 hr, this scenario comes in 3.48% below the baseline at 2.1 hr.
  • Use it at the start of a recall cycle to confirm you have the bench hours and technicians to clear everything due before its calibration expires. 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

  • Total calibration workload (hours): 2.1 hr (headline result)
  • Base calibration time (hours): 1.89 hr
  • Out-of-tolerance allowance (hours): 11 %
  • Calibration rate (instruments/min): 45 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Calibration Interval Workload calculator, set out-of-tolerance and rework allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.