---
title: "Why Do Manufacturers Use Sampling Instead of Testing Every Part?"  
description: "Why Do Manufacturers Use Sampling Instead of Testing Every Part?"  
author: "Lasse Dahl"  
published: 2026-10-27  
canonical: https://answers.mindstick.com/qa/118395/why-do-manufacturers-use-sampling-instead-of-testing-every-part  
category: "Mix Category"  
tags: ["manufacturing", "quality control", "Production"]  
reading_time: 1 minute  

---

# Why Do Manufacturers Use Sampling Instead of Testing Every Part?

When a factory produces thousands of identical parts, why might its quality team inspect a sample rather than check every single unit? I can see how full inspection takes time, but missing a faulty part could be costly too.

How do manufacturers decide how many parts to test and how often to take a sample? I’m especially curious about the trade-off between inspection cost and the risk of letting defects through, and whether the approach changes when a product is safety-critical.


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Original Source: https://answers.mindstick.com/qa/118395/why-do-manufacturers-use-sampling-instead-of-testing-every-part

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