Table of Contents
What does AQL level 1 mean?
As an example, consider an AQL of 1\% on a production run. This percentage means that no more than 1\% of the batch can be defective. If a production run is composed of 1,000 products, only 10 products can be defective. If 11 products are defective, the entire batch is scrapped.
What is a normal AQL level?
Under normal inspection, AQL levels range from 0.065 to 6.5. The larger the AQL level, the more lenient the inspection. For general consumer products inspection, AQL level is usually set at 2.5, which implies a zero tolerance for critical defect, 2.5 for major defects, and 4 for minor defects.
What does 0.065 AQL 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 are the types of AQL?
There are three general AQL inspection levels: “GI”, “GII” and “GIII”.
How do I select an AQL?
To sum up: There are no guidelines for deciding what AQL limits to choose. You have to decide what your tolerance will be. If the whole batch should not contain more than 1.0\% of a certain kind of defect (over the long run), then the AQL should be 1.0\% for this kind of defect.
What are the acceptable quality levels in Aql?
The acceptable quality levels in the second table determines the maximum allowed number of defect units. The Standard AQL level used is level II in table 1, and level 2.5 and level 4.0 in table 2 for major defects and minor defects respectively.
What is the batch size for Aql Level II?
We have provided an explanation below each AQL table. Let’s assume that you have ordered a quantity of 20.000 units and chosen AQL level II (See table above). This means that your batch size falls between 10,0001-35.000 units on the left side column (Underlined in red).
What are the two parts of Aql?
The whole AQL table and chart is divided into two parts, one is Sample Size Code Letters and the other is Single Sampling Plans for Normal Inspection. You have noticed that we use Critical, Major and Minor to classify the defects found in quality inspection.
What is the purpose of the Aql number table?
It was designed to make it easy for users to determine the number of samples required for quality inspection and the number of defect units allowed based on a given AQL. These tables are part of ISO2859 and are equivalent in all national and international standardization organizations, including ANSI.