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The impact of the unavailability of line replaceable units on the operational availability of system

Raymond A. Marie 1
1 DIONYSOS - Dependability Interoperability and perfOrmance aNalYsiS Of networkS
IRISA-D2 - RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES, Inria Rennes – Bretagne Atlantique
Abstract : The evaluation of the operational availability of a fleet of systems on an operational site is far from trivial when the size of the state space of a faithful Markovian model makes this issue unrealistic for many large fleet of systems. The main difficulty comes from the existence on the site of line replaceable units that may be unavailable from time to time when a breakdown occurs. In this paper, we present a simpler but approximate method which has given a quite good accuracy when tested on small cases. The main idea is to consider a non product form queuing network and to aggregate subsets of it as if they were parts of a product form queuing network. Nevertheless, the generalization to systems with multiple types of line replaceable units needs to be investigated further and tested with respect to the accuracy of the new approximate method. Keywords: integrated logistic system, stock shortage, line replaceable unit, operational availability, intrinsic availability, Markovian model, approximate method, non product form queuing network.
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https://hal.inria.fr/hal-01937235
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Submitted on : Wednesday, November 28, 2018 - 9:11:58 AM
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  • HAL Id : hal-01937235, version 1

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Raymond A. Marie. The impact of the unavailability of line replaceable units on the operational availability of system. ICIL 2018 - Fourteenth International Conference on Industrial Logistics, May 2018, Beer Sheva, Israel. pp.1-6. ⟨hal-01937235⟩

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