Study of the behaviour of queues (waiting lines) and their elements.
Queuing theory is a tool for studying several performance parameters of computer systems and is particularly useful in locating the reasons for "bottlenecks," compromised computer performance caused by too much data waiting to be acted on at a particular phase. Queue size and waiting time can be looked at, or items within queues can be studied and manipulated according to factors such as priority, size, or time of arrival.