What is quality assurance? QA for buyers

QA starts with how the goods will be made

For a buyer, QA means agreeing how the factory will turn your specification into repeatable production. That includes controlling document revisions, approving materials, preparing work instructions, training operators and deciding what happens when a check fails. The aim is to prevent avoidable defects and learn from failures.

Ask the supplier to explain the process for your product, rather than send a generic quality manual. For example, if an assembly can be fitted backwards, ask how the work instruction, fixture and checking method prevent that error. A finished sample alone cannot demonstrate those controls.

QA, quality control and batch inspection

Quality control checks whether materials, work in progress or finished goods meet requirements. Batch inspection applies agreed checks to an identified lot to support an acceptance decision. QA establishes and reviews the arrangements behind those checks. These activities overlap, and factories may use the names differently, so agree the actual work and records.

A factory audit examines whether the supplier's controls exist and operate at the named site. It does not replace inspection of your order. Use our factory-audit checklist for the visit and quality inspection guide for inspection stages and acceptance planning.

Request records that connect the process to your order

Request a product-specific quality plan linking important characteristics to the production step, checking method, acceptance criteria, responsible person and response to failure. Ask for the current specification and work instructions, alongside completed material checks, production checks and relevant measuring-equipment records.

Ask the factory to trace a recorded result back to the order, material batch, document revision and person who performed the check. Compare the blank procedure with completed records and what happens on the production floor. Where customer details are confidential, request redacted examples followed by records for your own order.

Keep process evidence and batch evidence distinguishable. A quality plan shows intended controls; completed records show their use; an inspection report records findings within its scope. Our audit and inspection report comparison explains those limits.

Agree change control and evidence of improvement

Agree which changes need your written approval before implementation, such as material substitution, tooling alterations, subcontracting or a revised production method. Ask how an approved change reaches purchasing, supervisors and inspectors, and how obsolete instructions are removed from use.

After a defect, request the affected-lot identification, containment action, investigated cause, process change and evidence that the change works. Sorting or reworking goods addresses the immediate batch; QA should also address recurrence. Ask for subsequent production records showing the revised control in use, rather than accepting a promise that staff will be more careful.

Keep product safety evidence and release decisions separate

Manufacturers and importers placing products on the UK market need to demonstrate compliance with relevant safety requirements. A QA review should therefore prompt a separate product-specific evidence check. Ask which configuration was tested, whether reports match the goods ordered and who will review the applicable requirements.

Before production, agree who reviews process records, who arranges inspection and who authorises shipment. Request the evidence while corrective action is still possible. Cambridge China Bridge can coordinate factory audits and order inspections through its China team; agree the scope and actual report issuer in advance.