Description Usage Arguments Value Author(s) References See Also Examples
This function computes control limits for the xbar charts, optionally revising them in the case that individual sample means plot outside the trial control limits.
1 |
xbar |
a numeric vector consisting of the subgroup averages |
n |
the subgroup size |
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 |
a list consisting of the upper and lower control limits and the centerline.
W.J. Braun
Montgomery, D.C. (2000) Introduction to Statistical Quality Control, Wiley
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