Formulas and Constants - Control Limits for Individual and Moving Range Control Chart

ezorangee · #1 11th July 2006, 04:13 AM

Can someone supply me the formulas and the constants for calculating the upper and lower control limits for an individual control chart and the moving range control chart. We are using a moving range based on two samples.

As always, your assistance is appreciated.

**Darius** · #2 11th July 2006, 09:41 AM

Check attachement.

Altho the constant 2.66 = 3/d2 = 3/1.128

ezorangee · #3 11th July 2006, 10:02 AM

Thank you, Darius.....I have saved and will try not to lose the info this time!

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