How do you calculate gauge availability risk?

Multiply gauge shortage severity by unavailability occurrence by availability detection weakness, each on a consistent scale. With 7, 5, and 4 the calculator returns a 5.55 risk score, flagging the gauge for review.

What is a good gauge availability risk score?

Lower is better. High scores — where a critical gauge is often unavailable and you find out too late — call for a duplicate or scheduling fix; low scores mean a backup exists or shortages are rare. The 5.55 here is mid-to-high and worth action.

Why multiply the three gauge scores instead of adding them?

Multiplication follows FMEA logic: a gauge is truly risky only when a shortage hurts, happens often, and is hard to see coming. Multiplying makes a gauge that is bad on all three dominate the ranking, while adding would let one low factor mask two high ones.

What does availability detection weakness mean?

It rates how poorly your system warns you that a gauge will be unavailable — out for calibration, checked out, or lost. A live gauge-crib system that flags this scores low; a paper logbook or no visibility scores high, because the shortage surprises the operator at the worst moment.

How is this different from gauge R&R?

Gauge R&R measures measurement-system accuracy and repeatability. This score is about logistics — whether the gauge is physically available when needed. A perfectly capable gauge still causes risk if it is constantly out for calibration with no backup.

Which input should I act on first?

Attack the largest factor first, but watch for compounding. Here shortage severity (7) is the biggest single driver, so a duplicate or expedited calibration that lowers occurrence would cut the 5.55 score most directly.

Fixture, Gauge & Workholding Management calculator

Gauge Availability Risk Calculator

Gauge Availability Risk scores how dangerous it is when an inspection gauge, fixture, or workholding device is not available when a job needs it. Quality engineers and gauge-crib managers use it to rank which gauges deserve duplicates, faster calibration turnaround, or tighter check-out control before a missing gauge stalls a line or forces an uninspected ship. It matters because a single shared go/no-go gauge or CMM fixture out for calibration can hold a whole work center hostage, and you rarely have budget to duplicate everything. An FMEA-style multiplicative score surfaces the gauges where shortage severity, frequency, and poor visibility line up — the ones that quietly cause the most disruption.

What this calculator does

Rank the risk that required gauges or inspection fixtures will not be calibrated, available, working, or in the right location when production needs them.
Use it when gauge shortages, calibration holds, damaged gauges, or shared inspection fixtures threaten production or shipment release.
It multiplies three scores — gauge shortage severity, unavailability occurrence, and availability detection weakness — into one risk score for prioritizing gauge and fixture action.

Formula used

Gauge Availability Risk score = gauge shortage severity score × gauge unavailability occurrence score × availability detection weakness score
Use the same scoring scale across comparable fixture, gauge, workholding, and inspection risks.

Inputs explained

Gauge shortage severity score: Score impact based on shipment hold risk, production stop risk, customer requirement, or lack of alternate measurement method.
Gauge unavailability occurrence score: Score occurrence using calibration history, lost-gauge incidents, fixture sharing conflicts, repair backlog, or usage frequency.
Availability detection weakness score: Score detection weakness based on how early current systems show calibration due dates, location conflicts, or unavailable gauges.

How to use the result

Use it during gauge-crib and workholding reviews to decide which devices need duplicates, calibration scheduling, or check-out controls.
Scores are judgment-based and the multiplicative scale is non-linear, so use them to rank gauges against each other, not as an absolute downtime or cost figure.

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 gauge availability risk? Multiply gauge shortage severity by unavailability occurrence by availability detection weakness, each on a consistent scale. With 7, 5, and 4 the calculator returns a 5.55 risk score, flagging the gauge for review.
What is a good gauge availability risk score? Lower is better. High scores — where a critical gauge is often unavailable and you find out too late — call for a duplicate or scheduling fix; low scores mean a backup exists or shortages are rare. The 5.55 here is mid-to-high and worth action.
Why multiply the three gauge scores instead of adding them? Multiplication follows FMEA logic: a gauge is truly risky only when a shortage hurts, happens often, and is hard to see coming. Multiplying makes a gauge that is bad on all three dominate the ranking, while adding would let one low factor mask two high ones.
What does availability detection weakness mean? It rates how poorly your system warns you that a gauge will be unavailable — out for calibration, checked out, or lost. A live gauge-crib system that flags this scores low; a paper logbook or no visibility scores high, because the shortage surprises the operator at the worst moment.
How is this different from gauge R&R? Gauge R&R measures measurement-system accuracy and repeatability. This score is about logistics — whether the gauge is physically available when needed. A perfectly capable gauge still causes risk if it is constantly out for calibration with no backup.

Last reviewed 2026-05-12.