A. Queue Monitoring is literally a function that measures how long people wait in line in places with a lot of waiting, such as restaurants and super market.
There is also a Mid/High Congestion option, so if the queue gets a bit long, It can alert the manager and he can respond immediately to the scene.

Also, through the VA Dashboard, you can monitor the day/week/month/year unit queue data and check the congestion level by period.