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Some Problems with Attribute Charts

Welcome to the wild, wacky, wonderful world of attributes charts!

Rip Stauffer
Thu, 04/01/2010 - 10:27
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It’s better to measure things when we can; that’s been well-established in the quality literature over the years. The use of go/no-go gauges will always provide much less information for improvement than measuring the pieces themselves. However, we don’t always have the luxury of using continuous or variables data. Sometimes, the only way to track the important events we want to track is to count them. Numbers of defectives, exceptions, reschedules, readmissions, rework rates, scrap rates… all these processes are vital to our operations, and all have to be counted. The performance of numerous transactional and other business processes can only be assessed using counts.

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Comments

Submitted by tzorin on Thu, 04/01/2010 - 11:32

An excellent article. Thanks.

An excellent article.
Thanks.

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Submitted by Steve Moore on Fri, 04/02/2010 - 06:53

Usefulness Of The XmR Chart

Rip, Thank-you for an excellent article. I have been utilizing control charts for many years and have found the XmR chart to be very versatile. I tell people to always use the XmR chart and you will rarely go wrong because this chart does not require any particular distribution of the data. It is a shame that the Six sigma community does not understand this.

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