What is the most common type of Queueing System?

FIFO: First-In, First-Out   A FIFO queue is a queue that operates on the first-in, first-out principle, hence the name. This is also referred to as the first-come, first-served principle. In other words, FIFO queueing is when customers are served in the exact order in which they arrive. FIFO is the most common type of [...]