Tag Archives: aql

What is the AQL (Acceptance Quality Limit)? An exhaustive guide

What Does AQL Mean? ‘AQL‘ stands for ‘Acceptance Quality Limit‘, and is defined as the “quality level that is the worst tolerable” in ISO 2859-1. It represents the maximum number of defective units, beyond which a batch is rejected. Importers … Continue reading

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What is an inspection level in ISO 2859-1 and ANSI/ASQ Z1.4?

This article introduces the different options available to buyers when it comes to the representation of product inspection findings. Inspection level II (under “normal severity”) is appropriate for most random quality inspections. But it is sometimes necessary to increase–or reduce–the … Continue reading

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Beware! QC inspections based on AQL & random sampling have limits

I wrote many times that QC inspections before shipment are a good way of keeping quality problems where they belong: In the factory. Quality control inspections are a good tool. But pointing out their limits is important. Misinterpreting their reliability is very easy.

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