How do you calculate AQL in garment industry?

Acceptance Quality Level (AQL) refers to the maximum number of defective items that could be considered accepted during the random sampling of and inspection….For Example:

1. Total garments (lot Size) 1200 garments.
2. Sample size (selected for inspection) 80 garments.
3. AQL 2.5 / 4.0.

Why AQL chart is needed in final inspection?

To ensure the right quality products, an AQL chart has to follow during an inspection of apparel which varies from product to product, process to process, and even buyer to buyer. Acceptable Quality Level (AQL) has great importance in the ready-made apparel business.

How is AQL inspection level determined?

AQL is based on acceptance sampling, a statistical QC sampling method for determining whether to accept or reject a production lot based on a representative sample size. And this ratio of defects found per total sample size helps determine whether the order passes or fails inspection.

What is AQL 2.5 in garment industry?

A standard acceptance quality level for a garment factory is 2.5% for major defects and 4.0 for minor defects. Additionally, critical defects normally require a zero tolerance acceptance level and any products that fail to meet the set acceptance quality level will undergo 100% inspection.

What does Aql stand for in garment inspection?

The term AQL stands for Acceptable Quality Level or Acceptance Quality Level. It is one of the most used terms in the garment industry when it comes into consideration to quality garment inspection, as we call it AQL Inspection. ( Related: How to use the AQL Table?)

How is acceptable quality level ( Aql ) determined?

As the whole lot of goods inspection is not viable, also not advisable, inspection is done on the sampling basis. In inspection how much percentage of defective pieces will be accepted depends on acceptable quality level. In the following table, a sampling plan is given for final shipment inspection.

What is the accepted quality level for garments?

Normally standard garments factory work to an AQL 2.5 for major defects and AQL 4.0 for minor. For critical defects, they adopt a Zero Acceptance Level. For deliveries that fail the AQL, a 100% inspection must be completed. Almost every factory recommends Suppliers use a tighter AQL in executing their internal audit.

How to select 1000 pieces to inspect in Aql?

Suppose you have been offered a shipment of 1000 pieces for inspection. Select the range from the table, it is 501-1200. Now from the AQL table, you need to select the number of samples you are going to actually inspect. According to the above AQL chart, you need to select 80 pieces out of 1000 pieces.

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