MAINTENANCE COST PREDITION MODEL FOR RAILWAY VEHICLE

초록

Estimation of maintenance and operation cost of a long-term life product through whole life cycle is one of the most important things to choose a solution among series of alternatives in railway operating company. In this paper, a life cycle cost, LCC, model for calculating maintenance cost for urban railway vehicle was developed. For this purpose, maintenance scenarios for simulating maintenance actions at a railway depot and workshop were defined and LCC models for each maintenance actions were developed. Database sheets for corrective and preventive maintenance tasks were developed to collect required data for LCC calculation. Maintenance cost of an auxiliary power supply system of urban railway vehicle was predicted as a case study by using the model. From the results, we knew that preventive maintenance, PM, cost is much higher than the corrective maintenance, CM, cost because the PM task consists of daily, monthly, and maintenance tasks which require lots of labor work. We expect that this model could help railway operating companies to make more effective maintenance strategies by considering the cost element in decision.