Course Solutions Uncategorized (Answered) : Determine the UCL for the Xbar chart of an Xbar R combined control chart given the following data Rbar = .9 Xbar centerline =

(Answered) : Determine the UCL for the Xbar chart of an Xbar R combined control chart given the following data Rbar = .9 Xbar centerline =

Determine the UCL for the Xbar chart of an Xbar R combined control chart given the following data
Rbar = .9
Xbar centerline = 4
s = .25
n = 5

Expert Answer


UCL = X bar central line + D4 x Rbar

Where D4 dependes on subgrup size (n) can be determined from standard table

here for n= 5 , D4= 2.114

UCL= 4 + 2.114 x 0.9 = 5.9

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