How do you calculate a supplier risk score?

Multiply the three ratings together: supply impact severity times issue occurrence times detection or mitigation weakness. With 8, 5, and 4 the calculator returns a supplier risk score of 5.95 on the configured scale.

What do severity, occurrence, and detection mean here?

Severity is how damaging a supply failure would be to the build, occurrence is how frequently this supplier causes problems, and detection-or-mitigation weakness is how likely an issue is to slip through before you catch or contain it. Higher always means worse.

What is a high supplier risk score?

On a standard scale the highest scores come from suppliers that rate high on all three axes. The example's inputs of 8, 5, and 4 indicate a high-severity, moderately frequent, moderately detectable risk that warrants action over lower-scoring suppliers.

Why use multiplication instead of adding the scores?

Multiplying mirrors FMEA risk priority logic so that a supplier scoring high on every axis is flagged far more sharply than one with a single high rating, which is exactly the compounding exposure you want to surface first.

How is this different from a single supplier scorecard rating?

A scorecard often blends on-time delivery and quality into one grade. This score isolates risk along three independent axes, so you can see whether the problem is the severity of a failure, how often it happens, or your inability to catch it.

How do I lower a supplier's risk score?

Attack the axis you can move: reduce severity by dual-sourcing or redesigning out a sole-sourced part, reduce occurrence by working the supplier's process, and reduce detection weakness with incoming inspection or earlier qualification gates.

Appliance Electronics & Control Boards calculator

Control Board Supplier Risk Score Calculator

A supplier risk score is an FMEA-style risk priority number that combines how bad a supply problem would be, how often the supplier causes issues, and how poorly you would detect or mitigate it before it hits the line. Supply chain and quality engineers use it to rank component, bare-PCB, and assembly suppliers on one consistent scale so scarce containment effort goes where the exposure is highest. For appliance control boards, where a single sole-sourced controller IC or a marginal PCB fab can stall an entire build, a structured score keeps prioritization objective instead of driven by whoever complained loudest. The power of the method is comparability: the same three-axis scale applied everywhere lets very different supplier risks be lined up and triaged.

What this calculator does

Score supplier risk for appliance electronics from supply impact severity, issue likelihood, and detection or mitigation weakness.
a procurement, quality, or program team needs to prioritize supplier risk mitigation for control board production
It multiplies supply impact severity, supplier issue occurrence, and detection-or-mitigation weakness into a single supplier risk score on your chosen scale.

Formula used

Control board supplier risk score = supply impact severity × supplier issue occurrence × detection or mitigation weakness
Use the same scoring scale across suppliers so component, PCB, and assembly risks can be compared.

Inputs explained

Supply impact severity:
Supplier issue occurrence:
Detection or mitigation weakness:

How to use the result

Use it during supplier qualification, annual supplier reviews, or sourcing decisions for control board components, PCBs, and assemblies to rank where to focus audits and dual-sourcing.
The multiplicative score is ordinal, not a probability or dollar figure, so two suppliers with the same score can carry very different real-world exposure and the result is only as consistent as your scoring rubric.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate a supplier risk score? Multiply the three ratings together: supply impact severity times issue occurrence times detection or mitigation weakness. With 8, 5, and 4 the calculator returns a supplier risk score of 5.95 on the configured scale.
What do severity, occurrence, and detection mean here? Severity is how damaging a supply failure would be to the build, occurrence is how frequently this supplier causes problems, and detection-or-mitigation weakness is how likely an issue is to slip through before you catch or contain it. Higher always means worse.
What is a high supplier risk score? On a standard scale the highest scores come from suppliers that rate high on all three axes. The example's inputs of 8, 5, and 4 indicate a high-severity, moderately frequent, moderately detectable risk that warrants action over lower-scoring suppliers.
Why use multiplication instead of adding the scores? Multiplying mirrors FMEA risk priority logic so that a supplier scoring high on every axis is flagged far more sharply than one with a single high rating, which is exactly the compounding exposure you want to surface first.
How is this different from a single supplier scorecard rating? A scorecard often blends on-time delivery and quality into one grade. This score isolates risk along three independent axes, so you can see whether the problem is the severity of a failure, how often it happens, or your inability to catch it.

Last reviewed 2026-05-12.