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LaurenceSD
Advocate II
5 years ago
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Statistical process control chart

Hi,

 

I need to create a Statistical process control chart & I'm struggling to get the Standard Deviation of a measure in order to create the Upper and Lower Control Limits - all the Standard Deviation formulas I've found are for columns rather than measures - is it possible to do this for a measure? Below is my graph, and I'd like to use the Rolling & Day Average line as my average and so the upper and lower controls lines should flow from them. Any help achieving this would be great. Thanks