Authors: Haibo Jin; Lina Sun
Addresses: School of Software, Liaoning Technical University, Liaoning Huludao 125105, China ' School of Software, Liaoning Technical University, Liaoning Huludao 125105, China
Abstract: An optimal repair approach for large-scale systems is proposed based on queuing theory. In this approach, system steady states corresponding to the number of failed components are obtained by analysing the transition probabilities between states. Because the transition probabilities of two adjacent states are not zero, the transition process, as one of Markov processes, is further determined as the birth-death process which is an important part of queuing theory. According to the queue theory, the long-run expected number and probability distribution function of failed components are derived. On the basis of above analysis, a constrained optimisation problem in terms of cost utility is formulated. Finally, the numerical examples are given to demonstrate the effectiveness of our optimal model.
Keywords: cost utility; birth-death process; queuing theory; constrained optimisation; optimal repair; large-scale systems; probability distribution; failed components.
International Journal of Reliability and Safety, 2014 Vol.8 No.2/3/4, pp.250 - 261
Received: 18 Feb 2013
Accepted: 18 Feb 2014
Published online: 20 May 2015 *