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Muni mean distance between failure

Wednesday, August 1, 2018

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Objective

Objective 2.1: Improve transit service

Metric

Muni mean distance between failure

Purpose

Mean distance between failure (MDBF) measures the transit fleet’s mechanical reliability and success of preventative maintenance efforts. A higher MDBF value indicates improving 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 10,000 MDBF for Motor Coach, 6,000 MDBF for Trolley Coach, 5,300 and 5,500 MDBF for LRV (Breda) in FY19 and FY20, 25,000 for LRV (Siemens), 2,700 and 2,900 MDBF for Historic Streetcar in FY19 and FY20

Reporting Frequency

Monthly

Contact

For questions, comments and accessibility issues, please contact the Performance Team at performance@sfmta.com.

Notes

N/A