INTRODUCTION OF DISCRETE EVENT SIMULATION AND ITS APPLICATION TO RAILWAY MAINTENANCE SYSTEM

초록

A lot of manufacturing knowledge and method has been applied to increase manufacturing efficiency in industry field. DES(Discrete Event Simulation) is one of solution to deal with manufacturing problems in factory. Beginning of this research to improve railway maintenance technology, maintenance knowledge of KNR (Korea National Railroad) and its technical problems are basically investigated. KNR has been maintained railway vehicle with their own solution based on experience. But very advanced and modern railway vehicles such as KTX (Korea Train Express) and TTX(Tilting Train Express) will be difficult to maintain with their old maintenance method. In order to apply knowledge of DES, railway maintenance system must be systematically considered. Imaginary maintenance machine are selected to variable of DES. Maintenance capability of each machine will be evaluated base on imaginary data from imaginary machine. The machines to fix advanced train are consisted of very advanced electrical parts and very expensive to replace. So target of research is minimization of number of machine in railway workshop. Basic knowledge of discrete event simulation is introduced. Five essential stages of discrete event simulation are provided. Each maintenance case defined as event. Each event is discrete and simulated base on different case such as one maintenance line with one machine and one maintenance line with two machines in railway workshop. Simple maintenance method, discrete event simulation, will be come out very powerful in complicate maintenance system and will be helpful to reduce maintenance cost as well as maintenance labor."