QC Inspections: How To Read The AQL Tables

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QC Inspections: How to Read the AQL Tables

QC Inspections: How to Read the AQL Tables

• Renaud Anjoran
• September 23, 2013
• No Comments

I have prepared a few videos that explain how to use the ANSI tables (also known as “AQL tables”).

Here is the first one. In less than 7 min, it will show you:

• How to find the number of samples to check;
• What the AQL limits are for each category of defects;
• What the arrows mean;
• How to also read the tables for double sampling plans.

Can’t see the video? Click here. 

You want to download the slides? Click here.

Let me know if something is unclear! Thanks.

In future videos, we’ll go more in-depth. We’ll study when using these tables is applicable, and why they are clearly in favor of the supplier.

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0 Responses

1. Mr Anjoran. This is a fantastic website and resource – thank you. I was curious about this tutorial about AQL. If the acceptance level of critical defects is 0, then how can this be confirmed without 100% inspection? The table goes down to 0.01% defect rate, which requires a minimum sample size of 1250 in order to detect a defect at that rate. If a 0% critical defect rate is acceptable, I can’t see how this can be achieved without 100% inspection (ie. your sample size = batch size in order to reject shipment for that single defect found).

   Reply

   1. “Acceptance zero” means “Acceptance zero within a certain sample”, not among the whole population. And an “acceptance zero” plan does not use the ISO 2959-1 standard. The tables would be different.

      Reply

      1. I understand – that makes sense.

         Thanks again.

         Reply

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

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

He is the CEO of The Sofeast Group.

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