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http://dx.doi.org/10.7232/IEIF.2012.25.2.153

A Reliability Optimization Problem of System with Mixed Redundancy Strategies  

Kim, Heung-Seob (Logistics Management Wing, Air Force Logistics Command)
Jeon, Geon-Wook (Department of Operations Research, Korea National Defense University)
Publication Information
IE interfaces / v.25, no.2, 2012 , pp. 153-162 More about this Journal
Abstract
The reliability is defined as a probability that a system will operate properly for a specified period of time under the design operating conditions without failure and it has been considered as one of the major design parameters in the field of industries. Reliability-Redundancy Optimization Problem(RROP) involves selec tion of components with multiple choices and redundancy levels for maximizing system reliability with constraints such as cost, weight, etc. However, in practice both active and cold standby redundancies may be used within a particular system design. Therefore, a redundancy strategy(active, cold standby) for each subsystem in order to maximize system reliability is considered in this study. Due to the nature of RROP, i.e. NP-hard problem, A Parallel Particle Swarm Optimization(PPSO) algorithm is proposed to solve the mathematical programming model and it gives consistently better quality solutions than existing studies for benchmark problems.
Keywords
reliability optimization; redundancy strategy; cold standby; parallel particle swarm optimization(PPSO);
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