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IR chart 4 sigma control limits

Hi,

 

When we make a IR control chart the UCL and LCL are based on 'mean + 3 sigma' limits. Is there anyway to increase the limits to 'mean + 4 sigma'?

 

thanks

Re: IR chart 4 sigma control limits

Hello,

 

When you are setting up your control chart in the dialog box you can specify the "Ksigma" in the Parameters box in the lower left corner.  

 

HTH