Dependability modeling and analysis of hybrid redundancy systems

Abstract

Purpose

The aim of this study is to demonstrate that hybrid redundancy systems are superior to the conventional N‐modular redundancy (NMR) systems.

Design/methodology/approach

The hybrid redundancy system is a synthesis of the NMR system and the standby redundancy. Each module of the NMR has access to k cold spares (k<N) and a repair facility. A semi‐Markov model for the hybrid redundancy system is developed and transient analysis is performed.

Findings

Some dependability measures such as availability, reliability, mean time to failure and steady‐state availability are obtained.

Originality/value

This paper presents the transient analysis of the hybrid redundancy systems. The results obtained will be useful to reliability engineers and reliability practitioners.

Citation

Chellappan, C. and Vijayalakshmi, G. (2009), "Dependability modeling and analysis of hybrid redundancy systems", International Journal of Quality & Reliability Management, Vol. 26 No. 1, pp. 76-96. https://doi.org/10.1108/02656710910924189