| 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. |
| πi,j | Steady-state probability of Markov state (i, j). |
| λ1 | Mean request rate of appointments by urgent CRs. |
| λ2 | Mean request rate of appointments by routine CRs. |
| µ1 | Mean service-completion rate of ongoing urgent appointments for a single CP. |
| µ2 | Mean service-completion rate of ongoing routine appointments for a single CP. |
|
| Mean rate of allocating CPs to the appointment requests by urgent CRs, depending on the value j. |
|
| Mean rate of completing the appointments by urgent CRs, depending on the value j. |
|
| Mean rate of allocating CPs to the appointment requests by routine CRs, depending on the values of i and j |
|
| Mean rate of completing the appointments by routine CRs, depending on the values of i and j. |