Order
Customer requirement, approved specification, destination and requested documents.
Quality & safety / Traceability
Follow the product. Find the evidence.
A traceability record connects what was ordered, what was used, what was checked, what was released and where it was shipped.
Record architecture
A usable chain, not a pile of files.
The framework starts with identifiers and relationships: each retained record must point back to a product, batch, unit, process step or shipment.
Traceability depth is defined by product risk, regulation, contract and practical record needs. A batch-level product may require a different identifier strategy from an individually serialized cylinder.
- BackwardFrom release to input records
- ForwardFrom batch to shipment or customer
- MeasurementFrom result to calibrated reference
- ChangeFrom revision to affected output
Traceability chain
One released batch, five linked record groups.
Identifiers move with the work so the final record does not rely on memory or manual reconstruction.
Inputs
Cylinder, valve, gas, label and packaging identifiers or controlled batch references.
Process
Filling or assembly record, equipment status, operator and critical parameters.
Release
Inspection and test results, disposition, reviewer and document revision.
Shipment
Quantity, package identifiers, logistics documents and destination connection.
Three traceability layers
Identity, measurement and event history.
Material & unit identity
Connect component or batch identifiers to the configuration that was actually produced and released.
Result traceability
Link a measurement result to the method, equipment, calibration chain and stated uncertainty where required.
Revision & disposition
Keep approvals, changes, deviations, rework and release decisions in chronological context.
Official references
Traceability means a documented connection.
NIST distinguishes metrological traceability from general chain-of-custody or product-history records. Both ideas may be needed, but they answer different questions.