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

초록

A lot of manufacturing knowledge and method have been applied to increase manufacturing efficiency in industry field. DES (Discrete Event Simulation) is one of way to observe manufacturing efficiency in factory. Now it can be modified to apply new monitoring system to estimate railway maintenance efficiency. In order to apply and knowledge of DES to railway maintenance monitoring system, all the important aspect of information such as old railway maintenance technology, maintenance knowledge of KNR (Korea National Railroad) and its technical problems must be basically investigated. KNR has been maintained railway vehicle with their own solution based on operational 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. The behavior of DES as it evolves over time is developed by simulation model. So railway maintenance monitoring 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 advanced train must be consisted of electrical parts. The objective of the paper is to minimize number of machines in railway workshop. Basic knowledge of discrete event simulation is introduced. Five essential stages of iscrete 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 monitoring method, discrete event simulation, will be recognized very powerful in complicate maintenance system and will be helpful to reduce maintenance cost as well as maintenance labor."