How do you calculate a Gauge Repeatability Score?

Multiply the three ratings together: impact x occurrence x detection weakness. With an impact of 8, occurrence of 5 and detection weakness of 4, the score is roughly 5.95 on the calculator's normalized scale, putting it in the mid-to-high priority band.

What is a good Gauge Repeatability Score?

Lower is better — it means low consequence, rare errors and strong detection. There is no universal threshold, but scores in the top 10-20% of your gauge list are the ones you act on first. Treat the example score near 6 as a clear candidate for a formal study.

Is this the same as a Gauge R&R?

No. Gauge R&R statistically measures real repeatability and reproducibility variation (%GRR, ndc). This score is an FMEA-style triage that tells you which gauges deserve that R&R study, using engineering judgment rather than measured data.

How do I rate the detection-control weakness?

Rate how unlikely your current controls are to catch a repeatability problem before bad parts ship. Strong controls (automated checks, frequent calibration verification) score low; relying on a single operator eyeballing a dial scores high, like the 4 used in the example.

Severity vs occurrence — which matters more?

Neither alone; the multiplication is the point. A high-severity gauge error that almost never happens and is always caught can score lower than a moderate error that is frequent and hard to detect. Always look at all three ratings, not just the headline number.

Can I compare scores across different gauge types?

Yes, as long as you use the same 1-10 scale for every gauge, fixture and workholding setup. That consistency is what makes the ranking valid across calipers, bore gauges and CMM fixtures.

Fixture, Gauge & Workholding Management calculator

Gauge Repeatability Score Calculator

The Gauge Repeatability Score is an FMEA-style risk priority number applied to a gauge, fixture or workholding measurement system. It multiplies how bad a repeatability error would be (impact), how often it shows up (occurrence) and how poorly your current checks catch it (detection weakness) into a single comparable number. Quality engineers and metrology leads use it to triage which gauges to send to a full Gauge R&R study first, instead of studying everything at once. On a busy shop floor where you have dozens of bore gauges, calipers and CMM fixtures, this score tells you where to spend your limited measurement-validation hours.

What this calculator does

Rank risk from poor gauge repeatability, operator variation, part location variation, or inspection fixture instability.
Use it before commissioning a new gauge, reacting to gauge R&R concerns, or deciding which inspection fixtures need containment or redesign.
It computes a single prioritization score by multiplying a gauge's repeatability impact, occurrence and detection-weakness ratings together.

Formula used

Gauge Repeatability Score score = repeatability impact score × repeatability occurrence score × detection-control weakness score
Use the same scoring scale across comparable fixture, gauge, workholding, and inspection risks.

Inputs explained

Repeatability impact (severity) score:
Repeatability error occurrence score:
Detection-control weakness score:

How to use the result

Use it during MSA planning, PPAP gauge sign-off, or any time you must rank which gauges and fixtures get studied or recalibrated first.
It is a relative ranking tool, not a measurement of actual gauge variation — a high score flags a candidate for a real Gauge R&R study, it does not quantify %GRR or ndc.

Current U.S. benchmarks

The U.S. has 14,378 furniture and related products establishments employing about 355,594 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate a Gauge Repeatability Score? Multiply the three ratings together: impact x occurrence x detection weakness. With an impact of 8, occurrence of 5 and detection weakness of 4, the score is roughly 5.95 on the calculator's normalized scale, putting it in the mid-to-high priority band.
What is a good Gauge Repeatability Score? Lower is better — it means low consequence, rare errors and strong detection. There is no universal threshold, but scores in the top 10-20% of your gauge list are the ones you act on first. Treat the example score near 6 as a clear candidate for a formal study.
Is this the same as a Gauge R&R? No. Gauge R&R statistically measures real repeatability and reproducibility variation (%GRR, ndc). This score is an FMEA-style triage that tells you which gauges deserve that R&R study, using engineering judgment rather than measured data.
How do I rate the detection-control weakness? Rate how unlikely your current controls are to catch a repeatability problem before bad parts ship. Strong controls (automated checks, frequent calibration verification) score low; relying on a single operator eyeballing a dial scores high, like the 4 used in the example.
Severity vs occurrence — which matters more? Neither alone; the multiplication is the point. A high-severity gauge error that almost never happens and is always caught can score lower than a moderate error that is frequent and hard to detect. Always look at all three ratings, not just the headline number.

Last reviewed 2026-05-12.