My capstone research project study on “Data-Driven RAM (Reliability, Availability, and Maintainability) Assessment of Metro Rolling Stock using the DMAIC Approach” focused on analyzing real operational and maintenance data from one of the MRTS Unit. The study identified critical subsystem failures, downtime trends, and maintenance challenges, demonstrating how data analytics and reliability engineering can support optimized maintenance strategies, improved operational efficiency, and enhanced reliability of modern metro systems.