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- W2343542867 abstract "This paper models a real-time warm standby system that has to accomplish a specified amount of task by a hard deadline. The system is subject to corrective replacements (CRs) upon failure of its operating element. It can also be renewed according to a predetermined schedule through preventive replacements (PRs). To facilitate an effective recovery of system operation after replacements, periodic backups are performed so that warm standby elements, upon being activated, can take over the mission task from the last backup point instead of from scratch. This paper presents a novel integrated model that considers effects of periodic backups, CRs and PRs in analyzing and optimizing real-time warm standby systems. Mission success probability and expected mission completion time are evaluated. Impacts of different mission and element parameters on mission success probability, optimal backup and PR policies, and optimal element activation sequence are investigated. It is shown that in warm standby systems with periodic backups and tight deadlines, PRs can improve the mission success probability even when they take the same time as CRs. When the maximum allowed mission time exceeds a certain level, PRs become ineffective and the optimal policy can involve only periodic backups." @default.
- W2343542867 created "2016-06-24" @default.
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- W2343542867 date "2017-09-01" @default.
- W2343542867 modified "2023-10-13" @default.
- W2343542867 title "Preventive Replacements in Real-Time Standby Systems With Periodic Backups" @default.
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- W2343542867 doi "https://doi.org/10.1109/tr.2015.2500369" @default.
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