Quality inspection: inline, final and AQL
Quality inspection means checking a lot before it goes to the customer, but good inspection is not done only at the end. An inline inspection catches a defect before it spreads across the run, while a final inspection gives an accept or reject decision based on a sample drawn from the lot. AQL is the international method for deciding by sample without checking every product.
In this part
- You tell when and why inline, mid-production and final inspections are done.
- You learn the logic of AQL: the sample size changes with the lot quantity.
- You learn to read from the list which supplier order an inspection is linked to and who carries it out.
- You see that when a defect is found, the corrective action is tracked from opening to closing.

Terms in this part
- Inline (mid-production) inspection
- The quality check made at regular intervals while sewing is under way, starting with the first pieces, that catches a defect before it repeats across bulk.
- Final inspection
- The last inspection, made on a sample drawn from the lot after pressing and packing are complete, that gives an accept or reject decision.
- AQL
- Acceptable quality limit: a method based on the ISO 2859-1 tables that lets you decide from a sample instead of the whole lot.
There are 3 questions at the end of the part; at least 2 correct answers open the next part. The questions open with your Academy account, after your Basic certificate.