Quality Control Charts

These functions are used to signal out of control points in Shewhart charts.

1 2 3 | ```
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"))
``` |

`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. |

The function `shewhart.rules`

simply calls the `beyond.limits`

and `violating.runs`

functions which actually do the real calculations.

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. |

Luca Scrucca luca@stat.unipg.it

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