Modeling of queuing utilizing computers

This paper discusses modeling of queuing. In the first step, the basic theory of queue, with limits and no limits of the queue length respectively, are arranged clearly for modeling, and the algorithm for coding is considered. The programs are formed with the spread sheet (Lotus 1-2-3) and GPSS, a language for simulation. In next step, the simulation is executed under different conditions of the number of service stations, mean arrival intervals, mean service time and utilizations. Such parameters, as a result, as queue length, waiting time and so forth are obtained under each condition. These parameters are compared with those obtained purely by the theory. It is concluded that simulation utilizing the spread sheet is more accurate. And that is practical because the simulation model for computers can be easily constructed. Furthermore, as the simulation process can be indicated in the display, this visualization helps beginners’ understanding. [In Japanese.]