Theory of queuing

Is more than one waiting queue management system in hospital (3 or more in the system). The speed queue management systems can be changed at queue management system any time, even if the machine is working. You want to know the average waiting time under these two policies. Jon Los, president of Melanoma, is experimenting with a new kind of stores and has remodeled one of them as follows. Instead of the typical queues at the cashier, he has set up a room to wait for your turn to pay. As the customers arrive, once the purchase is made, they go to the room, if all the cashiers are busy then they take a number and wait seated. Soon as a box is free the next number will be called to queue management software go through it. In the room there is no limit of customers who may be waiting. The engineer estimates that during peak hours customers arrive according to a Poisson distribution.