I am sitting in the DMV waiting to be called. The DMV has one of those systems in which you are assigned a coordinate that, when announced, calls you to a service rep.
What is the purpose of this kind of queue system? What are the advantages to simply assigning customers a number? The only reason I can think of is that, once the letters are assigned out of order it becomes hard to Hague how long a customer will wait, so it makes it easier to make people wait a long time.
Why are these systems used, how do they work, and how do they assign numbers?