Because there are people watching Uncle restaurant service and it makes many people who must joined the queue and waiting time in service longer, so there must be queuing model to handle Queuing to buy goods in shops.
The uncle There are a lot of people come into service. As a result, many people have to queue and wait times to get longer need a queuing. queuing model to deal with in-store purchases.
Because Uncle watch shop someone to receive the service. Therefore, there are a lot of people to queue and wait period of service for a long time have queuing. Model to deal with queuing buy goods in the shop.