Scale aij | Definition |

1 | factor i is as important as factor j |

3 | factor i is a little more important than factor j |

5 | factor i is obviously more important than factor j |

7 | factor i is intensely more important than factor j |

9 | factor i is extremely more important than factor j |

2, 4, 6, 8 | the importance is between its front number and the latter number |

reciprocal | When compare j to i,the aji = 1/aij |