Rules | Condition assessed |

Rule #1 | When a point falls outside UCL |

Rule #2 | At least 2 points out of 3 are in zone A. |

Rule #3 | 3 out of five consecutive points on a control chart fall above X |

Rule #4 | 8 consecutive points above X |

Rule #5 | 6 consecutive points decreasing or increasing. In this case only a decreasing scenario was used. |