shewhart.rules: Functions specifying rules for Shewhart charts
Description
These functions are used to signal out of control points in Shewhart charts.Usage
shewhart.rules(object, limits = object$limits, run.length = qcc.options("run.length"))
beyond.limits(object, limits = object$limits)
violating.runs(object, run.length = qcc.options("run.length"))
Arguments
object
an object of class 'qcc'.
run.length
the maximum value of a run before to signal a
point as out of control.
Value
The shewhart.rules function returns a list with components:
- beyond.limits
- the indices of points beyond control limits.
- violating.runs
- the indices of points violating runs.
Details
The function shewhart.rules simply calls the beyond.limits and violating.runs functions which actually do the real calculations.