Muni mean distance between failure
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Value |
Resiliency: A transportation system prepared for rapid economic, environmental and social change. |
Metric |
Muni mean distance between failure |
Purpose |
The mean distance between failure (MDBF) measures the transit fleet’s mechanical reliability and success of preventative maintenance efforts. A higher MDBF value indicates improving the mechanical performance of our fleet and better service reliability for Muni customers. |
Definition |
MDBF is determined by the total vehicle mileage divided by the total chargeable road calls, or disruptions due to mechanical failures, and is reported by mode. |
Methodology |
sum ([vehicle mileage]) ÷ sum ([chargeable road calls]) |
Target |
Achieve 12,000 MDBF for Motor Coach and Trolley Coach, 5,500 MDBF for LRV (Breda), 25,000 for LRV (Siemens), and 2,900 MDBF for Historic Streetcar in FY 22-23. |
Reporting Frequency |
Monthly |
Contact |
For questions, comments, and accessibility issues, please contact the Performance Team at performance@sfmta.com. |
Notes |
April 2020-December 2020: Due to COVID-19, Siemens LRVs and Breda LRVs were not in service. April 2020-May 2021: Due to COVID-19, Historic Streetcars were not in service. Reported results are subject to change as data quality improves or new data becomes available. |