A certificate of analysis, or COA, reports test results for a material, batch or product against stated characteristics. The issuer, methods and data determine how much confidence the buyer can place in it.
The operating decision
Specify required tests, limits, methods, units and batch linkage. Decide when supplier results need independent confirmation.
What to keep
Retain the original COA, batch or lot, manufacture date where relevant, test methods, results, specification and authorized issuer.
| Area | What the record should show |
|---|---|
| Control | Specify required tests, limits, methods, units and batch linkage. Decide when supplier results need independent confirmation. |
| Evidence | Retain the original COA, batch or lot, manufacture date where relevant, test methods, results, specification and authorized issuer. |
| Tradeoff | A generic certificate or copied result without lot traceability does not establish that the delivered material was tested. |
A practical limitation
A generic certificate or copied result without lot traceability does not establish that the delivered material was tested.
Related definitions: product testing, batch traceability, product specification sheet.
