A Failed Sample Is a Decision Point, Not Just a Rework Ticket

A failed sample gives information only if the team knows which criterion it failed. Capture the buyer's feedback verbatim where possible, attach the sample identifier and drawing revision, and separate measured nonconformity from preference. A fit failure, color preference and missing document need different responses.

Do not make the second sample blindly

Check whether the sample itself differed from the agreed specification, the specification was unclear, or the buyer's use condition changed. Inspect the process and material records for the first unit. Decide whether the fix is a process correction, design revision, new test or clarified acceptance criterion. Record who authorizes each path.

Tell the buyer what will change on the next sample and what will remain the same. If a design change affects price or lead time, update those documents too. Avoid calling a second sample “approved process output” until the relevant production method has actually been tested.

Keep the failed sample and its record long enough to compare with the revised version. A numbered sequence makes progress visible and prevents the same concern from reappearing because different teams learned different lessons from the first failure.

Worked example (illustrative)

A buyer says a cover “doesn't fit.” The supplier asks which mating part and revision were used, then compares the returned unit with its drawing and inspection record. If a dimension is wrong, process correction is needed; if the interface changed, design review comes first. The second sample addresses the diagnosed question.

Source check

Checked 2026-09-28. ISO quality-assurance overview describes inspection and testing as checks against specified requirements. The linked source supports this point only. The steps and worked example above are editorial guidance; they do not establish any supplier’s capability or guarantee a buyer response, order or delivery.

Evidence and use boundary

Editorial method reviewed: 2026-09-27. This article is an operational checklist, not a report of current market conditions or a claim about any particular factory, buyer, certification or delivery result. Check the current product and transaction records before acting.