How does a zipper supplier judge after-sales claims?

Q: How does a zipper supplier judge after-sales claims?

After-sales judgment on a zipper starts with the question of cause, not the question of blame. The supplier should examine the returned piece and classify the failure: a material defect, a workmanship defect, damage in garment making, damage in washing or pressing, or normal wear. Each class has a different outcome. A missing tooth or a failed slider return spring is usually a workmanship issue; a bent slider after a heavy pull may be a use issue; a fused tape after a high-temperature press is a garment process issue. Ask for the examination record and the reasoning, not only the conclusion. Compare the piece with the retained sample and the lot record. A single failure is handled as a replacement; a pattern of failures in one lot calls for a lot-level review. The judgment should be written and should state what will change, so the same failure does not return.