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:: Home ::Six Sigma ::SIX SIGMA GLOSSARY: Demerits Per Unit Control Charts :: CURRENT STUDENTS LOGIN

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Demerits Per Unit Control Charts
 

Demerits Per Unit control charts are used when the defects can be of varying severity. A weighting system is used to classify defects, more serious defects being given a higher weight.

The value plotted on the chart is calculated from the subgroup using:

equation for U

Control limits are calculated from:

Upper Control Limit
UCL U Chart
Lower Control Limit
LCL U chart
 

The selection, design and use of control charts is covered in the MiC Quality courses Statistical Process Control and Advanced Statistical Process Control.

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