Quick answer: An approved sample only controls production when its materials, dimensions, function and packaging are captured in a written specification. Verify the finished commercial lot against that specification before authorising shipment.
A polished sample can demonstrate what a factory is capable of making. It does not prove that thousands of production units will match it. Buyers sourcing in China need a clear link between sample approval, production instructions and final inspection, especially when an order includes several suppliers, variants or subcontracted steps.
Turn approval into a controlled specification
Label the approved sample and record its version, photographs and approval date. Describe the characteristics that matter instead of relying on the phrase 'same as sample'. Confirm dimensions and tolerances, materials, finish, function and packaging. Record approved alternatives explicitly. If a detail cannot be measured visually, agree a suitable test or supporting evidence.
Control changes during production
Name the person authorised to approve substitutions and revisions. Ask the supplier to flag material, component or artwork changes before using them. Keep a dated change record and ensure the inspector receives the current revision. Informal messages can provide context, but a production team needs one clear instruction set rather than several conflicting conversations.
Use an earlier check where it reduces uncertainty
For a new supplier or unfamiliar product, an in-process check can reveal recurring workmanship or assembly problems while there is still time to correct them. Select checkpoints according to product risk and production timing. An earlier visit does not remove the need to examine the final lot, since packaging, labels and later production may still differ.
Inspect the actual shipment lot
Identify order quantity, completed quantity, carton count and the variants available. Select samples across the defined lot using the agreed plan. Compare workmanship, measurements, function and packaging with the current reference. Record defect locations and counts with clear photographs. If factory access or test equipment is limited, state exactly which checks could not be completed.
Close the gap before releasing goods
A failed check needs a defined corrective action, not a new promise that the next batch will improve. Agree sorting or rework, segregation of rejected units and the evidence needed for re-inspection. Keep purchase, inspection and packing records connected to the same lot. The buyer should be able to explain why this shipment was released and which concessions, if any, were approved.
Buyer checklist
- Sample approval has a version and written criteria.
- Material and artwork changes require buyer approval.
- Final inspection covers the commercial lot and its variants.
- Rework and any concession are documented before release.
Frequently asked questions
Is an approved sample enough to release an order?
No. Approval defines the reference; the finished shipment still needs verification against it.
Does AQL mean a permitted defect percentage?
It is an index used in a sampling scheme. It should not be presented as a guarantee of the actual defect rate in the shipment.
Can the factory choose all inspected units?
That weakens representativeness. Agree access and selection across the defined lot with the inspector.
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