Quality & Metrology worked example

Gauge Repeatability with highest repeated reading of 25 measured units: a worked example

What does the result look like when highest repeated reading reaches 25 measured units? The full calculation is worked below with real intermediate numbers. Use it when checking equipment variation, the repeatability part of a gage study, before trusting a gauge for inspection.

The inputs for this scenario

  • Highest repeated reading (same part, same operator): 25 measured units (raised for this scenario; the documented default is 10.05)
  • Lowest repeated reading (same part, same operator): 9.97 measured units (unchanged)
  • Nominal or master (certified reference) value: 10 measured units (unchanged)

Working through the calculation

  • Applying the documented formula (Repeatability range = highest repeated reading − lowest repeated reading) to the inputs above produces each figure below.
  • At this operating point the engine returns 0 units for repeatability variation, the number this scenario is built around.
  • At this operating point the engine returns 0 value for spread.
  • At this operating point the engine returns 25 value for minimum.
  • At this operating point the engine returns 9.97 value for maximum.

How this compares with the baseline

  • Against the tool's baseline example, where highest repeated reading sits at 10.05 measured units and the headline result is 0 units, this scenario lands almost exactly on the baseline at 0 units.
  • A figure at this level is achievable when highest repeated reading is genuinely sustained, not just peaked for a shift. A simple max-minus-min range overstates variation on small samples and is not the same as the standard-deviation-based EV in a full ANOVA Gauge R&R; treat it as a fast screen, not a certified study.

Results at a glance

  • Repeatability variation: 0 units (headline result)
  • Spread: 0 value
  • Minimum: 25 value
  • Maximum: 9.97 value

Run it with your numbers

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

Last reviewed 2026-05-12.