A Method for the Calculation of the Mean Time To Failure (MTTF) of Repairable System
Advanced Materials Research, 2008The ability of executing assigned function of repairable system under certain condition is quite different from that of single unit due to redundant configuration. It is well understood that proper management strategy can greatly prolong the mean time to failure (MTTF) of repairable system.
Jian Xin Zhu +4 more
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Computing Steady-State Mean Time to Failure for Non-Coherent Repairable Systems
IEEE Transactions on Reliability, 2005Mean time to failure (MTTF) is an important reliability measure. Previous research is mainly concerned with the MTTF computation of coherent systems. In this paper, we derive equations to calculate the steady-state MTTF for noncoherent systems. Based on the equations, we extend the BDD by adding an intersection edge in each BDD node to efficiently ...
Dazhi Wang, Kishor S. Trivedi
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Mean First-passage Times for a k-out-of-n System with Repair
Journal of the Operational Research Society, 1989Summary: Consider a k-out-of-n system where the lifetimes of the components are independent and identically distributed exponential (\(\lambda)\) random variables. Each component has its own repair facility, the repair times being independent and identically distributed exponential (\(\mu)\) random variables, independent of the failure times.
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Availability and mean life time prediction of multistage degraded system with partial repairs
Reliability Engineering & System Safety, 1997Abstract In some environments, components might not always fail fully, but can degrade, and there can be multiple stages of degradation. In such cases, the efficiency of the system may decrease. After a certain stage of degradation the efficiency of the system may decrease to an unacceptable limit and can be considered as a total failure.
Hoang Pham, A. Suprasad, R.B. Misra
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Mean Time to Achieve a Failure-Free Requirement under Provisions of Spare and Repair
IEEE Transactions on Reliability, 1987This paper obtains an expression for the mean test-time to achieve a failure-free requirement under the provisions of spare and repair.
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Modelling and evaluation of mean time to repair at product design stage based on contextual criteria
Journal of Engineering Design, 2013Time to repair of a mechanical system is a function of its maintainability and external influences in the plant. Repairability means the ease of maintenance. In this paper, repairability features of the mechanical system are identified, and are modelled in terms of repairability digraph. The nodes in the digraph represent the repairability features and
Piyush Gupta +2 more
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Mean Time to System Failure for a 4-Unit Redundant Repairable System
IEEE Transactions on Reliability, 1974The mean time-to-system-failure is derived for a system with 4-identical components, each of which has a constant failure rate and unspecified repair rate.
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Mean time to first failure of repairable systems with one cold spare
IEEE Transactions on Reliability, 1995A general (nonMarkov) 1-out-of-2:G system with statistically-identical components, repair, and cold standby is reviewed. Coverage is considered, viz, failures of the switching mechanism for activating the spare. The explicit derivation of the mean time-to-first-failure and its in-depth discussion appear to be new.
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Allocation of Mean Time to Repair to Enhance Availability
2023ANTONY GRATAS VARUVEL, Rajendra Prasath
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Formulas for the mean time between failures and repairs of repairable redundant systems
Proceedings of the IEEE, 1965B. Epstein, S.J. Einhorn
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