International Journal of Mathematical, Engineering and Management Sciences

ISSN: 2455-7749

Age Based Overhaul Policy for Multiple Repairable Systems with Imperfect Maintenance: Case Study of Aero Engines

Garima Sharma
Subir Chowdhury School of Quality and Reliability, Indian Institute of Technology (IIT) Kharagpur, Kharagpur, India.

Rajiv Nandan Rai
Subir Chowdhury School of Quality and Reliability, Indian Institute of Technology (IIT) Kharagpur, Kharagpur, India.

DOI https://doi.org/10.33889/IJMEMS.2021.6.1.012

Received on March 26, 2020
  ;
Accepted on May 12, 2020

Abstract

Reliability analysis of complex multiple repairable systems (MRS) such as aero engines, rolling stocks and nuclear power plants has always been an area of interest for the research fraternity. An appropriate age based overhaul maintenance policy for such systems can provide impetus to the operations. The paper proposes two different age based maintenance policies; Policy-I and Policy-II, to evaluate the overhaul time of an aero engine, where Policy-I considers MRS with imperfect corrective maintenance (CM), whereas Policy-II examines MRS with both imperfect CM and preventive maintenance (PM). The paper then provides a spare parts estimation model for both the policies. The developed policies and spares parts model are validated by considering field failure data of aero engines as a case and the obtained results are compared with the existing time based maintenance policy used for aero engines. The paper recommends the best policy to be used for MRS in general and the considered case in particular.

Keywords- Multiple repairable systems, Age based overhaul, Maximum likelihood estimators, Spare parts, Generalized renewal process.

Citation

Sharma, G., & Rai, R. N. (2021). Age Based Overhaul Policy for Multiple Repairable Systems with Imperfect Maintenance: Case Study of Aero Engines. International Journal of Mathematical, Engineering and Management Sciences, 6(1), 193-206. https://doi.org/10.33889/IJMEMS.2021.6.1.012.

Conflict of Interest

The authors confirm that there is no conflict of interest to declare for this publication.

Acknowledgements

Authors express their sincere thanks to IIT Kharagpur for providing the research facility.

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