Results 211 to 220 of about 15,461 (258)
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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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Imperfect repair and lifesaving in heterogeneous populations
Reliability Engineering and System Safety, 2007In this theoretical paper we generalize the notion of minimal repair to the heterogeneous case, when the lifetime distribution function can be modeled by continuous or a discrete mixture of distributions. The statistical (black box) minimal repair and the minimal repair based on information just before the failure of an object are considered.
Maxim Finkelstein
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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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Maintenance policies for protection systems with imperfect inspection and imperfect repair
Reliability Engineering and System SafetyIn this study, we investigate the optimal maintenance policies for stochastically deteriorating protection systems with imperfect inspections and imperfect repairs. We model the system's degradation as a continuous-time Markov chain with three states: good, poor, and failed.
Salih Tekin, Büsra Keles
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Warranty servicing with imperfect repair
International Journal of Production Economics, 2008A manufacturer of a product sold with warranty incurs additional costs from the servicing of warranty claims made by customers. These costs depend on several factors such as the reliability of the product, the warranty terms, the maintenance actions of the customers, and the servicing strategy used by the manufacturer.
Won Young Yun, D N P Murthy, N Jack
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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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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
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2011
We consider two main approaches for modeling of imperfect repair processes. The first approach is via the modeling of conditional intensities, which combines in some sense the features of the “extreme” repair processes, RP and NHPP. The second approach is via the notion of effective ages, where the idea is that repairs may result in improved system ...
M. Luz Gámiz +3 more
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We consider two main approaches for modeling of imperfect repair processes. The first approach is via the modeling of conditional intensities, which combines in some sense the features of the “extreme” repair processes, RP and NHPP. The second approach is via the notion of effective ages, where the idea is that repairs may result in improved system ...
M. Luz Gámiz +3 more
openaire +1 more source