Optimizing Availability and Performance of a Two-Unit Redundant Multi-state Deteriorating System

Sonia Malefaki (), Vasilis P. Koutras () and Agapios N. Platis ()
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Sonia Malefaki: University of Patras
Vasilis P. Koutras: University of the Aegean
Agapios N. Platis: University of the Aegean

A chapter in Recent Advances in Multi-state Systems Reliability, 2018, pp 71-105 from Springer

Abstract: Abstract The most of the contemporary large scale technological systems are functioning under multiple stages of degradation, from their perfect state to their total failure. The study of the performance and the availability of multi-stage systems is of great importance since their deterioration and/or failure may lead to important losses. Under a proper inspection and maintenance policy, it is feasible the operation of the system to be improved significantly. Our main goal is to model multi-state systems with redundancy and to identify the optimal maintenance policies. The system is inspected periodically. Depending on the condition of the system, either no action takes place or maintenance is carried out, either minimal or major. The proposed model takes also into account the scenario of imperfect and failed maintenance. The asymptotic behaviour of the system is studied and optimization problems for the asymptotic availability, the downtime cost and the expected cost due to maintenance and unavailability, with respect to inspection intervals, are formulated and solved.

Keywords: Multi-state systems; Redundancy; Preventive maintenance; Dependability measures; Operational cost; Optimization (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1007/978-3-319-63423-4_5

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