How do you calculate a supplier risk score?

Multiply the three FMEA ratings together: severity x occurrence x detection. With a severity of 6, occurrence of 4 and detection of 3 the supplier risk score is 4.55 on the tool's scaled output, which then gets ranked against your other approved suppliers scored the same way.

What is a good supplier risk score for a sterile barrier vendor?

There is no universal pass line - it is relative. Most sterile barrier programs draw an action threshold (for example, escalate anything in the top quartile of scored suppliers or above a set RPN) and require a documented risk-reduction plan for Tyvek, film or sterilizer suppliers above it.

What does severity mean in a supplier FMEA?

Severity rates the consequence if that supplier's defect reaches your process - a lid stock delamination that breaches the sterile barrier scores far higher than a cosmetic label misprint, because it can void sterility of the finished device.

Should I weight detection differently for a contract sterilizer?

Detection captures whether you would catch the problem before it affects product. For a contract sterilizer, dosimetric release or biological indicator results give strong detection (low score); for a raw film supplier where you rely on their COA, detection is weaker (higher score), which correctly raises the RPN.

Supplier RPN vs single-factor risk ranking - which is better?

A single factor like defect rate misses consequence and detectability. RPN combines all three, so a rarely-failing supplier whose failures are catastrophic and hard to detect still surfaces as high priority - exactly what you want for sterility-critical materials.

How often should supplier risk scores be updated?

Re-score at every re-qualification and immediately after any complaint, CAPA, or incoming rejection. A confirmed pouch seal failure should raise occurrence and often severity, moving that supplier up your audit queue.

Sterilization & Sterile Barrier Manufacturing calculator

Supplier Risk Calculator

Supplier Risk scoring is an FMEA-style Risk Priority Number (RPN) applied to the vendors that feed a sterile barrier operation - Tyvek and medical-grade paper mills, film converters, adhesive and ink suppliers, and contract sterilizers. Supplier quality engineers and QA managers use it to rank which suppliers get the tightest incoming inspection, the earliest re-audit, and the most aggressive corrective-action follow-up. In a regulated ISO 11607 / ISO 13485 environment, a single porous-lid or pouch material lot can compromise seal integrity across thousands of finished devices, so a defensible, numeric ranking of supplier risk is what keeps limited SQE hours pointed at the vendors that can actually put sterility at risk.

What this calculator does

Estimate supplier risk for sterilization and sterile barrier manufacturing using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.
Use it when supplier risk in sterilization and sterile barrier manufacturing needs a defensible ranking against other sterilization and sterile barrier manufacturing risks for the next review.
It multiplies a supplier's severity, occurrence and detection ratings into a single Risk Priority Number that ranks that supplier against others scored on the same scale.

Formula used

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

Inputs explained

Supplier risk severity score:
Supplier risk occurrence score:
Supplier risk detection score:

How to use the result

Use it during supplier approval, annual re-qualification, or after a nonconformance to decide audit frequency, inspection level, and whether a second-source is needed.
RPN is ordinal, not a probability - a 4.55 and a 5.0 are only meaningfully different if every rater applies the exact same 1-to-10 anchor definitions, so it ranks priorities rather than predicting failure rates.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).

Common questions

How do you calculate a supplier risk score? Multiply the three FMEA ratings together: severity x occurrence x detection. With a severity of 6, occurrence of 4 and detection of 3 the supplier risk score is 4.55 on the tool's scaled output, which then gets ranked against your other approved suppliers scored the same way.
What is a good supplier risk score for a sterile barrier vendor? There is no universal pass line - it is relative. Most sterile barrier programs draw an action threshold (for example, escalate anything in the top quartile of scored suppliers or above a set RPN) and require a documented risk-reduction plan for Tyvek, film or sterilizer suppliers above it.
What does severity mean in a supplier FMEA? Severity rates the consequence if that supplier's defect reaches your process - a lid stock delamination that breaches the sterile barrier scores far higher than a cosmetic label misprint, because it can void sterility of the finished device.
Should I weight detection differently for a contract sterilizer? Detection captures whether you would catch the problem before it affects product. For a contract sterilizer, dosimetric release or biological indicator results give strong detection (low score); for a raw film supplier where you rely on their COA, detection is weaker (higher score), which correctly raises the RPN.
Supplier RPN vs single-factor risk ranking - which is better? A single factor like defect rate misses consequence and detectability. RPN combines all three, so a rarely-failing supplier whose failures are catastrophic and hard to detect still surfaces as high priority - exactly what you want for sterility-critical materials.

Last reviewed 2026-05-12.