shewhart.rules {qcc}R Documentation

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'.
limits control limits
run.length the maximum value of a run before to signal a point as out of control.

Details

The function shewhart.rules simply calls the beyond.limits and violating.runs functions which actually do the real calculations.

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.

Author(s)

Luca Scrucca luca@stat.unipg.it

[Package qcc version 1.2 Index]