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Statistical Sampling for Garment Quality Control - Tip of the Day

We all want the clothes that we manufacture to be one hundred percent perfect in regard to quality. However, it is very time consuming and costly to complete full quality testing on every single garment produced. This is why the majority of companies will utilize some sort of statistical sampling method.

If we flip a coin one time, the odds of the coin landing on heads is 50%.
If we flip the same coin ten times, it is actually unlikely that we will get exactly 5 heads and 5 tails.
But if we flip that coin thousands or tens of thousands of times we know that approximately 50% of the time the coin would land on heads.

This is the principle of statistical auditing. The statistical projections from a relatively small sampling are accurate enough to serve as a workable standard for a large number of instances. Therefore, if we have a shipment of 10,000 T-shirts (being produced in one factory), we can for example check the quality of portion of the order to determine if a quality concern exists. Certainly the system is not perfect, but doing the statistical audit is often the best option.

You can learn more about clothing quality testing and inspection companies at Apparel Search.

Views: 592

Comment by Heather on October 7, 2008 at 2:19pm
So weird... u must have been reading my mind... I was JUST wondering about quality control issues for my new line. - helpful, thanks!- HSB
Comment by Balogun Emmanuel Olamide on February 23, 2010 at 7:18pm
I was just thinking of quality control problems the Nigeria Fashion Industries were facing, and How to help solve those quality control issues.
Comment by Mindy Martell on July 30, 2012 at 12:33pm

Having a Spec Sheet and/or Tech Pack helps make the quality assurance process smoother and better. This is a document per garment specifying everything from stitches per inch, pantone colors, weight of fabric, points of measure, label placement etc... so the factory knows EXACTLY what you expect. This document eliminates many problems before they exist. Then, using this document to check pre-production samples and production is a clear way to be sure the factory is meeting the requirements. We always say, many times it is not the factory that is poor but could be the quality of information going to the factory that is poor. Learn more about this step at http://www.clothierdesignsource.com/technical-design

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