| Variable | Value |
|---|---|
| service intensity (p) | |
| probability of no cust. in system (Po) | |
| average number of cust expected in system (L) | |
| number of cust expected waiting in system (Lq) | |
| duration time in system expected by cust (W) in hour(s) | |
| duration time of waiting in system expected by cust (Wq) in hour(s) |