Moreover, one should not conclude too quickly and the company, the queue management cost of an employee waiting time waiting is equal to his salary during the waiting time; this would imply that the net decline gains of the company, due to the inactivity of the employee, is equal to the salary of the last, which, a priory, is not clear. The employee, he works and he waits, receives the same salary. By cons, its contribution to earnings of the company is really lost as lower productivity. When a machine operator is inactive because he expects his productive force (which may include, in addition to his salary, proportion of the company's fixed costs) is lost. In other words, we must take account not of the physical resource on hold, but the value (cost) of all inactive economic resources, and then evaluate the loss of profit from the loss of productivity. The objective of the analysis of queues is to find a queue management software compromise between cost associated with service capacity and the cost of waiting customers. Figure. Shows although this concept. Note that when the service capacity increases, the cost of service increased. For simplicity, we have shown a cost of linear service. It does not affect the demonstration. When the service number employees capacity increases, the number customer waiting and waiting times tend to decrease, so waiting costs decrease. The total cost (the sum of operating costs and standby time) is shown the graph by a u-shaped curve graphically, it suffices to determine the service level resulting in the minimum total cost. (unlike the model economic quantity used in inventory management, the minimum is not necessarily occur at the point of intersection of the line and the curve.) In the case of external customers to the company, the queues give a negative image of the quality of service offered. In this situation, the companies will tend to increase the speed of service rather than increasing the number employees. Lowering the cost of waiting will effectively move downwards the u-shaped curve, which represents the total cost.
In the theory of queues, called “population” source customers potential. There are two possible situations. In the first case, the population is infinite, that is to say, the potential number of customers is infinitely large at all times. This is the case customer queue management system of customers supermarkets, banks, restaurants, cinemas, call centers, etc. In addition, customers come from all possible areas. In the second situation, the population is over, which means more info that the number potential customers is limited. A good example is the number of machines, aircraft, etc., for compensation within the business service center. The company in question has a number finished machinery, aircraft, etc. Here are other similar situations: a nurse in charge of patients, a bank employee responsible for filling and emptying atm, a secretary who takes care of five representatives, a controller air navigation who heads the landing.