Traceability

Traceability is the ability to trace a manufactured part back to its raw material lot, the specific process and machine it went through, and its inspection records, typically through lot numbers, serial numbers, and documented records linking each stage. It's often a formal requirement in regulated industries such as aerospace and medical, where a quality issue needs to be traced back to its root cause and affected parts identified.

Why traceability adds real overhead, applied where it's actually required

Traceability requirements add real overhead, tracking material lots, recording process and inspection data per part or batch, which is why it's typically only required where the industry or customer specifically demands it, rather than applied universally.

Where traceability requirements appear

Called out as a specification or note requiring lot traceability, material certification, or similar record-keeping, rather than implied by geometry.

Common mistakes

Assuming traceability can be added retroactively after a quality issue arises; without records captured at each stage as it happens, traceability isn't possible to reconstruct after the fact.

Is traceability required for every part?

No, it's typically required by specific industries (aerospace, medical) or specific customer requirements, not universally.

What does traceability actually track?

Material lot, process and machine history, and inspection records, linked back to a specific part or batch.

Can traceability be added after the fact?

Not really; it depends on records captured at each stage as production happens, which can't be reconstructed retroactively.