[Legacy Report] WMATA Mileage Based Asset Management (MBAM)

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WMATA is the second largest rail transit system in the United States, and carried over 217 million passengers in 2011, across 106 miles of track, using 86 stations. Since 1976, WMATA rail car fleet maintenance has utilized time-based schedules and life-cycle intervals to determine when minor and major scheduled maintenance is performed. Time-based maintenance assumes that every rail car undergoes the same mileage, loading and wear. In actuality, the operational stress that any given rail car is subjected to varies by rail line, routes, schedules, maintenance queues and parts availability. The result is the premature failure of components on the higher-use vehicles and the corresponding premature replacement of parts on the lower use vehicles. In order to progress to mileage based preventive maintenance, it is important to accurately capture mileage on the car. The exact mileage is also assigned to each sub-system/component on that car. Each sub-system undergoes periodic maintenance and overhaul based on the mileage captured.

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