A defect was reported from one market, and the same production lot was shipped to another market two weeks later. The factory had recorded the complaint, replied to it, and continued producing from the same lot, because nothing in the …

The gate that catches most defects is usually the one with the least inspection in it. Incoming verification and final inspection are easy to count and easy to report; the in-process gate is where the defect is actually prevented, and …

Four failures account for most QC breakdowns on charger programmes, and three of them are visible in the paperwork within an hour. None of the four is a machine problem, and all four survive because they look like normal practice …

Two audits were carried out on the same line in the same month. One produced a twelve-page report and no change; the other produced four findings, a retrained station and a revised fixture. The difference was not the auditor. It …

A lot passed the factory's inspection and failed the customer's, using the same sampling table on both sides. The table had been agreed; the defect classification had not. A scratch that the factory recorded as minor was a major defect …

The most expensive functional test is usually the one that measures the fewest useful things. A line tester with twelve positions and a limit copied from a datasheet costs more per unit than a tester with four positions and limits …

Two figures decide whether a burn-in programme means anything: the load the units carry and the ambient they run in. Without both, the rack produces warm units and a pass rate, not evidence. Everything else in the programme follows from …

Two programmes ship the same charger with the same specification. One ages every unit at full load for a fixed period; the other ages a sample from each shift and keeps the results. Their field failure rates differ by less …

Four test types cover most of the field failures reported on a charger, and a programme built around them usually costs less than a single field return campaign. The order matters as much as the tests: a reliability programme that …

Two factories can hold the same certificate and behave differently on the second order. One can show what it measured last month, which limit it compared against and who signed it; the other can show the certificate. The difference appears …

A batch was rejected at the customer's incoming inspection and accepted at the factory's outgoing one. Both inspections were performed, both were recorded, and the two used different limits. The factory had inspected against the figure its line had always …

Two factories can quote the same test list and behave differently in the field. What separates them is not the list: it is which units get tested, what the limit is compared against, and whether a record survives the shipment. …