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How The AQL Inspection Levels In ISO 2859-1 Affect Sampling Size

June 16, 2021

How The AQL Inspection Levels In ISO 2859-1 Affect Sampling Size

This article introduces the different AQL inspection levels available to buyers. Those levels are mentioned in the ISO 2859-1 standard (or its American equivalent, ANSI/ASQC Z1.4). Let’s explore the different levels of random inspections, and how they affect the size of the samples your inspector will pull out of each batch during an inspection. … [Read more...]

Filed Under: Quality Control Tips Tagged With: ANSI/ASQ Z1.4, ISO 2859-1, quality inspections, Sampling, special inspection levels

Why the AQL tables are not in favor of the buyer

September 30, 2013

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 products and keeps shipping them regularly (e.g. twice a month) to the same customer. As a consequence, the assumption is that quality is under control. And an inspection is used to catch the big accidents. What it means is that the statistics are way, way … [Read more...]

Filed Under: Quality Control Tips Tagged With: ANSI/ASQ Z1.4, AQL, Aql Tables, defects, product inspections, qa, QC, quality inspections


Weekly updates for professional importers on better understanding, controlling, and improving manufacturing & supply chain in China.

This is the official blog of Sofeast.com.

This blog is written by Renaud Anjoran, an ASQ Certified Quality Engineer who has been involved in chinese manufacturing since 2005.

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