How to Read an AQL Inspection Report Before You Approve a Bag Order
A pre-shipment inspection report usually arrives as a two-page PDF with a small table in the middle. That table decides whether your order ships or goes back for rework, so it is worth ten minutes of attention before you reply "approved".
What AQL actually measures
AQL stands for Acceptable Quality Limit. It comes from the ISO 2859-1 and ANSI Z1.4 family of standards, which define how many pieces to pull from a lot and how many defects in that sample still count as acceptable.
It is worth being precise about what the number means. AQL is not a promise about the defect rate of every unit in the lot. It is a rule for deciding whether a lot passes or fails on the evidence of a random sample. A lot can pass at AQL 2.5 and still contain defective pieces; the standard simply sets the point at which the risk of accepting a bad lot becomes too high.
The three defect classes
Most bag inspections sort findings into three classes. It helps to define them in your purchase order, because a defect that is minor to one person is major to another.
- Critical: safety, legal or function-breaking issues, such as a sharp point on a rivet, a broken zipper pull, or a restricted substance above the limit. The accept number for critical defects is normally zero.
- Major: faults a customer would notice or that shorten the life of the bag, such as the wrong hardware finish, a misaligned panel, skipped stitching, or a colour that does not match the approved swatch.
- Minor: cosmetic findings that do not affect saleability or function, such as light handling marks, uneven edge paint within tolerance, or a thread end left long.
On bulk orders we work to 0 critical, 2.5 major and 4.0 minor as the default level. If your retail customer requires something tighter, tell us at the quotation stage, when the sampling plan can be agreed before production starts rather than argued about afterwards.
Where the numbers in the table come from
Three inputs produce the table: the lot size, the inspection level (general level II is the default in most consumer goods programmes), and the AQL you have set for each defect class.
Take an order of 1,500 bags. At general level II the sample size is 125 pieces. At AQL 2.5 major the accept number is 7 and the reject number is 8; at AQL 4.0 minor it is 10 and 11. Seven major defects in the sample and the lot passes. Eight and it fails.
What to agree before the inspection
- Defect definitions for your specific bag, written into the purchase order rather than left to the inspector's judgement.
- A colour standard: a signed swatch, and the light source used for comparison, with D65 the usual choice.
- A hardware finish reference, ideally a physical approved sample kept by both sides.
- Measurement points and tolerances: where the width and height are measured, and how much variation is allowed.
- Whether the inspection happens in line, at 80 per cent packed or fully packed, and who arranges and pays for it.
If the lot fails
A failed inspection is a decision point rather than a disaster. The options are usually one of four: a full sorting pass to pull out the defective pieces, rework of the affected units, shipment of the good portion with an agreed deduction, or replacement of the defective components.
Recovery time depends on what went wrong. Sorting a 1,500-piece lot is normally a matter of days. Replacing the wrong lining or hardware can mean re-sourcing material, which can push the ship date by weeks. Locking the material specification before cutting is cheaper than inspecting it afterwards.
Our part in the process
We inspect our own production in line and before packing, and we can share our internal report on request. If your programme calls for a third-party inspector, we can arrange access to the floor, the cartons and the packing list so the visit runs on schedule. If our inspection checklist would be useful as a starting point for your own, ask us and we will send it over.