Reliability, Availability and Maintainability Analysis for Transportation Vehicles—A Case Study in APSRTC.

Performance of a system depends on the reliability of its subsystems if any, the maintenance efficiency, and the operating conditions. Failures are more frequent if the size and complexity of the systems increase and the effect of these
failures on system performance is critical. Therefore, reliability and maintainability analysis is required to identify the bottlenecks in system for designed reliability and maintainability. In this paper, a methodology has been presented and is applied on road transportation vehicles in Andhra Pradesh State Road Transport Corporation
(APSRTC) as a case study. The best fit for time between failures (TBF) of subsystems is identified with Anderson–Darling (A–D) values and the respective parameters are calculated. Also, availabilities are estimated for all types of vehicles and bottlenecks are identified. This method will help to identify the optimal maintenance intervals for each subsystem as well as the system