Materials Management, Warehousing, and Supply Chain
This domain tests receipt, sampling and status control of materials, reliance on supplier certificates, storage and stock rotation, retest versus expiry dating, and supply chain integrity including distribution controls. Questions often turn on whether a certificate of analysis can replace testing.
Receipt, sampling and testing
- 211.80 requires written procedures for receipt, identification, storage, handling, sampling, testing and approval or rejection of components, containers and closures.
- 211.82 requires visual examination of each container on receipt for labelling, damage, broken seals, tampering or contamination, with results documented.
- 211.84 requires representative samples to be tested or examined, with at least one test to verify identity of each component.
- Where a supplier certificate of analysis is accepted in lieu of full testing under 211.84(d)(2), the manufacturer must still conduct at least one specific identity test on each container and must establish the reliability of the supplier's analyses through periodic validation of the supplier's results.
Status control and stock rotation
- Materials exist in defined states such as quarantine, released, rejected, returned or recalled, identified by status labelling and segregation. Quarantine may be physical or enforced by a validated computerised system.
- 211.86 requires first-in-first-out use of approved components; 211.87 covers retesting of approved components subject to deterioration; 211.89 requires rejected components to be identified and controlled under a quarantine system to prevent use.
- 211.94 requires containers and closures to protect against deterioration and not to be reactive, additive or absorptive.
- Retest dates apply to many APIs and excipients; expiry dates apply to drug products. Confusing the two is a classic error.
Supplier and distribution chain
- Supplier qualification includes questionnaires, certificate review, on-site or remote audit, a quality agreement and ongoing performance monitoring through complaints, deviations and out-of-specification results.
- Distribution controls include temperature mapping and qualification of shipping lanes, excursion assessment, and documented chain of custody. For prescription drugs in the US, DSCSA requires transaction information, authorised trading partners, verification of suspect and illegitimate product, and serialisation.
- Falsified and counterfeit product risk is managed by verified sourcing, serialisation and market surveillance.
Worked example
A consignment of a new excipient from a qualified supplier arrives with a complete certificate of analysis. A weak answer releases it on paperwork alone. A strong answer confirms the specification attributes and methods match the certificate, performs at least an identity test on each container unless a justified reduced-testing programme applies, confirms the reliability of that supplier's analyses has been established historically, records the decision in the supplier qualification file, and confirms storage conditions and retest dating before release to the warehouse.
Traps that cost marks
- Believing a qualified supplier exempts you from identity testing; 211.84(d)(2) still requires it.
- Using retest date and expiry date interchangeably.
- Storing rejected material in the general warehouse with only a label and no effective segregation.
- Accepting a certificate without checking that the supplier tested the attributes and used suitable methods.