Simulation of Queueing Systems Using Pascal Language

Abstract

The aim of this study is to formulate models that can be used to simulate the behavior of queueing systems in order to know the range of the efficiency of service centers to offer service in short time with least cost .To achieve this aim the researcher has designed to programs using Pascal Program Language .These programs make use of the previous data taken from the system (inter arrival times and service time of units and it’s probabilities or it’s probability distribution) .Then the user must enter the number of customer s whom the user want to simulate .here this programs calculate the cumulative probabilities of these times, after that the programs generate the random numbers which imitate these times .Then it is possible to know the time of arrival for each units ,service time ,time service begin ,time service end ,time spent by units in the queue ,also these models calculate the average of waiting time. The advantages of these programs can be summarized as following: -To facilitate the system study behaviour in the long run in short time. -Minimizing effort and cost . -Calculating the measurements special for queueing system . -Establishing a basement for decision makers to depend on concerning the system.