What is the key assumption for the single-server queue model?

The average interarrival time is greater than the average process time.

The average interarrival time is less than the average process time.

The capacity of the server is less than the demand rate.

The flow rate is greater than the capacity.

The average inter arrival time is less than the average process time.

Explanation:

Queue model is used to describe the waiting lines through a mathematical equation. It clearly assumes that the inter arrival time that is the time in between any two waiting is less than the average processing time.

And accordingly all the things gets to add more processes, and there is a stage in which all the things are into processes.

And since the interval time is low thus, the key assumption stated in statement 2 is correct.