International Standard and Statistical measurement used to determine the quality of the product by determining the Maximum acceptable number of defects that are allowed in the Random Sample Size taken.
When “Randomly Samples” are tested, and if the number of of defects is below predetermined amount, that product is said to meet the AQL.
How AQL Works?
Select Inspection Level:
- Choose the inspection level based on the importance of the product and sensitivity of industry.
Determine Sampling Size:
- Using an AQL sampling chart, match the batch size with the chosen inspection level to identify the sample size code letter.
- Find the corresponding sample size from the table. This sample will represent the entire batch.
Conduct Inspection:
- Randomly select the sample items from the batch.
- Inspect each item for defects, categorizing them as critical, major, or minor.
Compare Defects with AQL Limits:
- Acceptance (Ac) and Rejection (Re) numbers for each defect category. If the number of defects in the sample is less than or equal to Ac, the lot passes inspection.
- If the number of defects exceeds Acceptance criteria, the lot fails and may require corrective action, rework, or rejection.
Decision:
- Confirm: The batch is considered acceptable and approved for shipment or sale.
- Not Confirm: The batch is rejected or flagged for additional inspection, sorting, or rework.
Finally, alignment of AQL standards ensure smooth operations, minimized risk, and high-quality outcomes.
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