# 252 - Acceptance Sampling Fundamentals: AQL, Attributes vs Variables, and Risk (OC Curves)

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Text version: https://stenobird.com/podcast/let-s-combinate-drugs-devices-4474248/252-acceptance-sampling-fundamentals-aql-attributes-vs-variables-and-risk-oc-curves.md
Podcast: [Let's Combinate - Drugs + Devices](https://stenobird.com/podcast/let-s-combinate-drugs-devices-4474248)
Published: 2026-08-31T10:00:00+00:00
Episode link: https://podcasters.spotify.com/pod/show/letscombinate/episodes/252---Acceptance-Sampling-Fundamentals-AQL--Attributes-vs-Variables--and-Risk-OC-Curves-e3o44b6
Audio file: https://anchor.fm/s/6770b9a0/podcast/play/124964646/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-7-31%2F430859580-44100-2-e8c39d223ce46.mp3
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Duration seconds: 786

## Resource

Acceptance sampling is one of the most commonly used and commonly misunderstood tools in quality. In this video, I break down the fundamentals of acceptance sampling: what it is, what an AQL actually means, the difference between sampling by attributes and variables, and the risk involved when we use a sample to make an accept/reject decision about an entire lot. We’ll also introduce Operating Characteristic (OC) curves, producer risk, and consumer risk — because acceptance sampling is probability-based and every sampling plan comes with tradeoffs. This is the first video in a series on acceptance sampling. Future videos will go deeper into attribute sampling, variable sampling, and how to select and apply sampling plans in practice. Topics Covered: * What acceptance sampling is * Why acceptance sampling is probability-based * AQL — Acceptance Quality Limit * Why AQL does not simply mean “allowable percent defective” * Attribute vs. variable acceptance sampling * ISO 2859-1 / ANSI-ASQ Z1.4 * ISO 3951 / ANSI-ASQ Z1.9 * Operating Characteristic (OC) curves * Producer risk vs. consumer risk * How overly tight or overly loose sampling plans can create problems Chapters 00:00 Introduction 01:30 Why Acceptance Sampling Matters 01:45 Perfect World vs. Reality 02:49 What Is Acceptance Sampling? 03:53 Attributes vs. Variables 05:21 What Is AQL? 07:05 Risk & the OC Curve 09:57 Producer & Consumer Risk 12:05 Practical Takeaway About Subhi Saadeh Subhi Saadeh is the Founder and Principal of Let’s Combinate, an independent media, education, and consulting company focused on drug device combination products, quality systems, and quality engineering. Subhi is a consultant, trainer, and auditor with a background spanning R&D, industrialization, commercialization, and quali…

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