1. What is a sampling plan? A sampling plan allows an auditor or a researcher to study a group (e.g. a batch of products, a segment of the population) by observing only a part of that group, and to reach conclusions with a pre-defined … [Read more...]
What is the “AQL” (Acceptance Quality Limit) in simple terms?
What Does AQL Mean? 'AQL' stands for 'Acceptance Quality Limit', and is a method used by many businesses to check a random sample from the production batch of their products and confirm that the risk of bad quality is relatively low. In … [Read more...]
The Different Sampling Plans Contained in the ISO 2859 Series
The vast majority of inspectors follow the ISO 2859-1 standard. But about ISO 2859-2, -3, and so on? The relationship between these parts is explained in ISO 2859-10:2006 (introduction to the ISO 2859 series of standards for sampling for … [Read more...]
Why the AQL tables are not in favor of the buyer
This is the third and last video about the ANSI tables (also known as “AQL tables”). As I explained in the last video, these sampling schemes were designed for very stable relationships, where the manufacturer keeps making the same … [Read more...]
How to choose an AQL limit?
A few months ago, I wrote an explanation about the "AQL": what it is and how to use it. I also listed a few frequent questions, but it seems like I forgot one of them: What AQL tolerance is suitable to my products? Unfortunately, it is … [Read more...]