Attribute Data charts

Further to what you might have read in http://qualitynotion.com/what-control-chart-shall-i-use-3/..

Unlike the C chart, U chart does not require a constant number of sample items, and it does not require any limit to the potential number of defects/nonconformities. Further more for a P- chart of NP chart, the number of non conformities cannot exceed the number of items on a sample, but for a U chart it is acceptable because what is being addressed is not the number of defective items, but the number of defects on the sample. In short,

Attribute Data  charts

 

 

 

 

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About

The author is a Quality Assurance professional by experience. Part Quantitative data analyst, part consultant for quality and information security practices, part software tester, she is a writer by passion and blogs at https://wordsandnotion.wordpress.com and http://qualitynotion.com/.

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