Table 3 Variable symbols and definitions
From: Obstetric operating room staffing and operating efficiency using queueing theory
Variable symbol | Definition |
|---|---|
λ | arrival rate |
µ | served rate |
P0 | probability that the system is empty |
Ls | average number of people in the system |
Lq | average length of the queue or the average number of people in a line waiting for service |
Ws | average time for a patient in the system (waiting time plus service time) |
Wq | average time spent in queue |
Wq(0) | probability that the time spent in the queue is 0 |
ρ | utilization factor for entire system |
n | number of patients in the system / number of operating rooms in use in the system |
Pn | probability that n patients require simultaneous operating room service |