What is AQL in inspection?

What is AQL in inspection?

The acceptable quality level (AQL) is a measure applied to products and defined in ISO 2859-1 as the “quality level that is the worst tolerable.” The AQL tells you how many defective components are considered acceptable during random sampling quality inspections.

Why is AQL used for inspection?

AQL is highly flexible because it allows you to customize your quality tolerance for your product and for the three types of quality defects: critical, major and minor. Consumer products often use AQLs of 0, 2.5 and 4.0 for critical, major and minor defects, respectively.

How use AQL table for product sampling and inspection?

4 Steps to determining your sample size and defect tolerance using the AQL table

1. Choose your inspection type and inspection level. Your inspection type will be either “general” or “special” shown in the two columns on the first part of the table.
2. Determine accept and reject points and sample size based on your AQL.

How do I do AQL inspection?

How to run a quality inspection using the AQL procedure

1. 1 Determine your sampling plan. Start by determining how many units will be in your sample batch.
2. 2 Randomly select sample units.
3. 3 Inspect each unit in the sample batch.
4. 4 Determine the number of defective units.
5. 5 Report any quality issues.

What does AQL of 0.65 mean?

AQL means the poorest level of quality that is considered acceptable in a particular population or in a pre-defined sample size. For example: “AQL is 0.65%” means “I want no more than 0.65% defective items in the whole order quantity, on average over several production runs with that supplier”.

What is the difference between AQL and RQL?

The acceptable quality level (AQL) is the highest defective rate or defect rate from a supplier’s process that is considered acceptable. The rejectable quality level (RQL) is the highest defective rate or defect rate that the consumer is willing to tolerate in an individual lot.

What is a 2.5 AQL?

If the buyer only mentions AQL 2.5, it means that the buyer accepts all kind of defects: critical, major or minor, to be present in the manufactured goods at a level of 2.5% of the total order quantity. It is highly recommended to define an acceptable quality limit for each defect type: critical, major, minor.

What does an AQL level of 1.0 mean?

“0/1 reject/accept level” means that the lot is passed if there is 0 defect, and rejected if there at least 1 defect. In practice it is similar to an AQL of 0.065%, except if your order quantity is above 150,000 pcs (I am assuming level II). Daniel Fok says.