xCC {CC}

x-Chart Parameters

Description

This function computes control limits for the x-charts, optionally revising them in the case that individual values plot outside the trial control limits.

Usage

xCC(x, sigma, k = 3, mu, newdata)

Arguments

x

a numeric vector consisting of the subgroup averages

k

the control chart parameter governing the width of the control limits

sigma

an estimate of the in-control standard deviation

mu

(optional) an estimate of the in-control mean

newdata

(optional) new observations

Value

a list consisting of the upper and lower control limits and the centerline.

Author(s)

W.J. Braun

References

Montgomery, D.C. (2000) Introduction to Statistical Quality Control, Wiley

See Also

plot.CC