Description Usage Arguments Value Author(s) References See Also Examples
This function computes control limits for R-charts, optionally revising them in the case that ranges plot out of the trial control limits.
1 |
R |
a numeric vector consisting of the subgroup ranges |
n |
the subgroup size |
k |
the control chart parameter governing the width of the control limits |
sigma |
(optional) an estimate of the in-control standard deviation |
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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