Your data is only as good as the system that measured it.

I’ve audited factories that made decisions worth millions — based on measurements they’d never validated.

That’s like navigating with a broken compass.

Gauge R&R (Repeatability & Reproducibility) is the study that answers one fundamental question:

Can your measurement system actually be trusted?

It breaks down into two critical components:

R1 → Repeatability (Equipment Variation) Same operator. Same part. Same gauge. Multiple times. Does the gauge give the same reading every single time?

R2 → Reproducibility (Appraiser Variation) Different operators. Same part. Same gauge. Do different people get the same result?

If either answer is “not really” — every quality decision you’ve made is built on sand.

How to conduct the study in 5 steps:

Step 1 → Select 10 parts that represent your full process variation Step 2 → Assign 2–3 trained operators who regularly use this gauge Step 3 → Each operator measures all 10 parts, 2–3 trials — blind, no sharing results Step 4 → Record all data in an Excel sheet — it calculates your R&R% automatically Step 5 → Interpret the result and decide

How to read your result:

• Below 10% → Excellent. Gauge is fully acceptable ✔
• 10% to 30% → Marginal. Investigate before relying on it ⚠
• Above 30% → Unacceptable. Improve or replace the gauge ✘

This study is mandatory under ISO/TS 16949 for every inspection process in automotive and manufacturing — but every industry that measures anything should be doing it.

Because if you cannot trust your measurement system, you cannot trust any decision based on it.

💬 Has your organisation ever run a Gauge R&R study? What did you find?

📩 DM me “GAUGE” and I’ll run a free Measurement System Assessment for your facility.

#GaugeRR #MSA #MeasurementSystemAnalysis #QualityManagement #ISO #LeanManufacturing #OperationalExcellence #SixSigma #Consulting