How do you calculate supplier capability gap risk?

Multiply the severity, occurrence, and detection scores together. Using the demonstrated scale with severity 6, occurrence 4, and detection 3, the risk score resolves to about 4.55 on this tool's normalized scale, giving a single comparable priority figure.

What is a good supplier capability gap score?

Lower is better because it means low-impact, rare, easily caught gaps. There is no universal cutoff, but teams typically set an action threshold and require corrective action for any score above it, with high-severity gaps escalated regardless of the total.

Why use severity, occurrence and detection instead of one number?

A single overall rating hides why a gap is risky. Splitting it lets you act correctly: high occurrence calls for process improvement at the supplier, while poor detection calls for better inspection or gauging, and high severity may demand redesign.

How is capability gap risk different from audit readiness risk?

Capability gap risk targets whether the supplier's process can actually make the part to spec; audit readiness risk targets whether their quality system and documentation would survive scrutiny. A supplier can be capable but audit-unready, or vice versa.

Should detection score high mean good or bad?

A high detection score means the gap is hard to detect, which is bad — it raises the risk number. Score it high when a defective outcome from the gap could slip through both the supplier's and your incoming checks.

How do I lower a capability gap score?

Attack the largest driver. Improving supplier process control lowers occurrence, adding a poka-yoke or gauge lowers detection difficulty, and only a design or requirement change lowers severity — then rescore to confirm the action worked.

Supplier Quality, Development & Audits calculator

Supplier Capability Gap Calculator

Supplier capability gap risk is an FMEA-style priority number that ranks the danger of a specific shortfall in a supplier's process capability — a missing gauge, an unqualified operator, a Cpk that will not hold. Supplier development engineers and sourcing quality teams use it to decide which gaps get closed first when audit findings outnumber the resources to fix them. It matters because not every capability gap is equally dangerous: a hard-to-detect gap on a safety characteristic outranks an obvious cosmetic one. Multiplying severity, occurrence, and detection turns qualitative audit notes into a comparable priority number.

What this calculator does

Estimate supplier capability gap for supplier quality, development and audits using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.
Use it when supplier capability gap in supplier quality, development and audits needs a defensible ranking against other supplier quality, development and audits risks for the next review.
It multiplies severity, occurrence, and detection scores for a supplier capability gap into a single risk priority number for ranking.

Formula used

Supplier capability gap risk score = supplier capability gap severity score × supplier capability gap occurrence score × supplier capability gap detection score
Use the same scoring scale across comparable supplier capability gap risks.

Inputs explained

Capability gap impact severity (1-10):
Capability gap occurrence likelihood (1-10):
Capability gap detection difficulty (1-10):

How to use the result

Use it after a capability audit or PPAP review to prioritize which supplier gaps to close, and to track whether corrective actions actually lower the score.
RPN is ordinal, not linear — a score of 120 is not twice as urgent as 60 — and it can hide a critical high-severity gap behind a low occurrence or detection score, so always review severity on its own too.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate supplier capability gap risk? Multiply the severity, occurrence, and detection scores together. Using the demonstrated scale with severity 6, occurrence 4, and detection 3, the risk score resolves to about 4.55 on this tool's normalized scale, giving a single comparable priority figure.
What is a good supplier capability gap score? Lower is better because it means low-impact, rare, easily caught gaps. There is no universal cutoff, but teams typically set an action threshold and require corrective action for any score above it, with high-severity gaps escalated regardless of the total.
Why use severity, occurrence and detection instead of one number? A single overall rating hides why a gap is risky. Splitting it lets you act correctly: high occurrence calls for process improvement at the supplier, while poor detection calls for better inspection or gauging, and high severity may demand redesign.
How is capability gap risk different from audit readiness risk? Capability gap risk targets whether the supplier's process can actually make the part to spec; audit readiness risk targets whether their quality system and documentation would survive scrutiny. A supplier can be capable but audit-unready, or vice versa.
Should detection score high mean good or bad? A high detection score means the gap is hard to detect, which is bad — it raises the risk number. Score it high when a defective outcome from the gap could slip through both the supplier's and your incoming checks.

Last reviewed 2026-05-12.