Graduate research analyzing platform screen door failures across the KORAIL network. The study evaluated component reliability, wear-out patterns, seasonality, and manufacturer-level differences using 10,078 failure records from 279 stations and 18 lines.

Methodology

Monte Carlo simulation modeled reactive, preventive, condition-based, and predictive maintenance strategies — comparing long-term cost, failure reduction, safety risk, and availability outcomes.

Outcomes

Quantitative comparison framework for maintenance policy decisions on public rail infrastructure — supporting reliability engineering and safety planning.