ABSTRACT
Queues are very common in industries also, in shops where the machines wait for repair/maintenance, operators wait at tool cribs, material waiting for operations etc. These queues ruin the time of customers and it may even cost hugely in some occasions. The minimisation of waiting time and thus costs are the primary concerns of these queue models in Operation Research. A queue system may be studied by diving into two subsystems viz arrival system and service system. The arrival system is based on customer’s behaviours and their process of arrival while the service system is dependent on the service mechanism and server’s behaviour. Queuing models can be defined by five most significant features. D. G. Kendall has noticed three of them in the form (a/b/c) and later A. M Lee added two more in the form (d/e) to describe a queue model.
