What Is Tolerated Quality
The Acceptable Quality Level differs from process to process, product to product and buyer to buyer. In this blog post, we’ll take a closer look at AQL in the apparel industry as well as explore what other options to ensuring textile quality management you may have.
The acceptable quality limit (AQL) is the worst tolerable process average (mean) in percentage or ratio that is still considered acceptable; that is, it is at an acceptable quality level. Closely related terms are the rejectable quality limit and rejectable quality level (RQL). In a quality control procedure, a process is said to be at an acceptable quality level if the appropriate statistic used to construct a control chart does not fall outside the bounds of the acceptable quality limits. Otherwise, the process is said to be at a rejectable control level.
What Are The Aql Defects
Instances of failure to meet customer quality requirements are termed as defects. In practice, there are three categories of defects:
Critical defects: Defects, when accepted could harm users. Such defects are unacceptable. Critical defects are defined as 0% AQL.
Major defects: Defects usually not acceptable by the end-users, as they are likely to result in failure. The AQL for major defects is 2.5%.
Minor defects: Defects not likely to reduce materially the usability of the product for its intended purpose but that differ from specified standards; some end users will still buy such products. The AQL for minor defects is 4%.
How Works Aql In Practice
Acceptable quality level (AQL): AQL is typically considered to be the worst quality level that is still considered satisfactory. It is the maximum percent defective that can be considered satisfactory. The probability of accepting an AQL lot should be high. A probability of 0.95 translates to a risk of 0.05.
Rejectable quality level (RQL): This is considered an unsatisfactory quality level and is sometimes known as lot tolerance percent defective (LTPD). The consumer’s risk has been standardized in some tables as 0.1. The probability of accepting an RQL lot is low.
Indifference quality level (IQL): This quality level is somewhere between AQL and RQL. Different companies maintain different interpretations of each defect type. However, buyers and sellers agree on an AQL standard that is appropriate to the level of risk each party assumes. These standards are used as a reference during a pre-shipment
Sources : Wikipedia – Sgt Group