Results 251 to 260 of about 100,307 (296)
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Cost evaluation for an imperfect-repair model with random repair time
International Journal of Systems Science, 2005A repair can bring the state of a failed system to a level which is somewhere between new and prior to repair. In most repair models proposed in the literature so far, the repair time is assumed to be negligible, and so the length of repair time has not been a factor in developing the maintenance models.
Jae-Hak Lim, Dae-Kyung Kim, Dong Ho Park
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A General Imperfect Repair Model Considering Time-Dependent Repair Effectiveness
IEEE Transactions on Reliability, 2012Kijima I and Kijima II models are two important imperfect repair models in literature. These two models use one constant parameter to represent the degree of repair, which is called Repair Effectiveness (RE) in this paper. We developed a more general imperfect repair model by extending the constant RE to a time-dependent function based on the virtual ...
Uday Kumar
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Operations Research, 1986
In this paper, we consider models of systems whose components have dependent lifelengths and are imperfectly repaired upon failure until they are scrapped. First, assuming that no more than one component can fail at a time, we study two models that describe imperfect repairs, and derive the resulting density and other probabilistic quantities of ...
Moshe Shaked, J. George Shanthikumar
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In this paper, we consider models of systems whose components have dependent lifelengths and are imperfectly repaired upon failure until they are scrapped. First, assuming that no more than one component can fail at a time, we study two models that describe imperfect repairs, and derive the resulting density and other probabilistic quantities of ...
Moshe Shaked, J. George Shanthikumar
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Journal of Applied Probability, 1983
A device is repaired at failure. With probability p, it is returned to the ‘good-as-new' state (perfect repair), with probability 1 – p, it is returned to the functioning state, but it is only as good as a device of age equal to its age at failure (imperfect repair). Repair takes negligible time.
Brown, Mark, Proschan, Frank
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A device is repaired at failure. With probability p, it is returned to the ‘good-as-new' state (perfect repair), with probability 1 – p, it is returned to the functioning state, but it is only as good as a device of age equal to its age at failure (imperfect repair). Repair takes negligible time.
Brown, Mark, Proschan, Frank
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A 2-unit System with "Imperfect" Repair
Mathematische Operationsforschung und Statistik. Series Optimization, 1980In the study of repairable systems, it is usually assumed that a unit is ‘new’ after repair. While this assumption simplifies the analysis of such systems, there are many instances, in which this assumption is not true. In this paper, we study a 2-unit cold standby redundant system, In which the number of repairs that can be done for each unit is h and
Subramanian, R., Natarajan, R.
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Journal of Applied Probability, 1992
We consider models of systems of components with dependent life-lengths having certain multivariate distributions. Upon failure, components are repaired. Two types of repair are possible. After perfect repair, a unit has the same life distribution as a new item.
Sheu, Shey-Huei, Griffith, William S.
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We consider models of systems of components with dependent life-lengths having certain multivariate distributions. Upon failure, components are repaired. Two types of repair are possible. After perfect repair, a unit has the same life distribution as a new item.
Sheu, Shey-Huei, Griffith, William S.
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Optimal Repair Limit Replacement Policies with Imperfect Repair
Journal of the Operational Research Society, 1981This paper considers the repair limit replacement policies with imperfect repair. The repair is imperfect in the sense that the mean life of a repaired system is less than the mean life of a new system. Furthermore, we examine the repair limit replacement policy for the case in which there are two types of repair-local and central repair.
Nguyen, D. G., Murthy, D. N.P.
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Multivariate age‐dependent imperfect repair
Naval Research Logistics (NRL), 1991AbstractIn this article we consider models of systems whose components have dependent life lengths with specific multivariate distributions. Upon failure, components are repaired. Two types of repair are distinguished. After perfect repair, a unit has the same life distribution as a new item.
Sheu, Shey-Huei, Griffith, William S.
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A repairable system with imperfect coverage and reboot
Applied Mathematics and Computation, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jau-Chuan Ke, Tzu-Hsin Liu
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Optimizing Series Repairable Systems with Imperfect Repair
International Journal of Operations Research and Information Systems, 2011Repairable systems are either repaired perfectly to a state of as good as new or imperfectly. In this work, a system which undergoes imperfect repair is investigated. A nonlinear mathematical model is formulated for a system with the objective of finding the optimum failure and repair rate with the minimum costs subject to attaining a pre-specified ...
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