Title: Reliability allocation technique for complex system of systems

Authors: Antony Gratas Varuvel; Pratibha Xavier Pruno

Addresses: Aeronautical Development Agency, Post Box No. 1718, Vimanapura Post, Bangalore, Karnataka 560017, India ' Alcatel-Lucent India Pvt Ltd, Manyatha Embassy Business Park, Silver Oak Wing-A, Bangalore, Karnataka 560046, India

Abstract: Reliability allocation is one of the important tasks during the design phase, which is to be executed as a part of DfR practices. Appropriate methodology is chosen based on the data available and the factors of influence required to be considered. Among those, the widely adopted AGREE method fails to meet the target reliability, when any of the importance indexes is less than unity. In addition, the assumption of exponential pdf is valid only to depict failures arising out of randomness. This paper aims to eliminate the shortcomings. Verification of the model under various boundary conditions has been carried out with the available data in the aerospace domain. Results obtained are found to be achieving the target goal set for the platform, which is a complex SoS.

Keywords: AGREE; advisory group on reliability of electronics equipment; allocation; failure rate; fighter aircraft; maintainability; MTBF; mean time between failure; MTTF; mean time to failure; reliability.

DOI: 10.1504/IJRS.2019.097017

International Journal of Reliability and Safety, 2019 Vol.13 No.1/2, pp.61 - 82

Received: 25 Sep 2017
Accepted: 13 Jun 2018

Published online: 14 Dec 2018 *

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