Parameter Notations | Definition |

M | Number of CPs in the system. |

(i, j) | A pair of values indicating a system state that i ongoing routine appointments and j ongoing urgent appointments. |

S | System state space. |

π | Steady-state probability of Markov state (i, j). |

λ | Mean request rate of appointments by urgent CRs. |

λ | Mean request rate of appointments by routine CRs. |

µ | Mean service-completion rate of ongoing urgent appointments for a single CP. |

µ | Mean service-completion rate of ongoing routine appointments for a single CP. |

${\lambda}_{j}^{\ast}$ | Mean rate of allocating CPs to the appointment requests by urgent CRs, depending on the value j. |

${\mu}_{j}^{\ast}$ | Mean rate of completing the appointments by urgent CRs, depending on the value j. |

${\lambda}_{i,j}^{\u2020}$ | Mean rate of allocating CPs to the appointment requests by routine CRs, depending on the values of i and j |

${\mu}_{i,j}^{\u2020}$ | Mean rate of completing the appointments by routine CRs, depending on the values of i and j. |