Results 11 to 20 of about 733,404 (291)
Optimal Repair Limit Replacement Policies with Imperfect Repair
Journal of the Operational Research Society, 1981 This 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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Optimizing Series Repairable Systems with Imperfect Repair
International Journal of Operations Research and Information Systems, 2011 Repairable 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 ...
Mohammed Hajeeh
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Virtual series-system models of imperfect repair [PDF]
Reliability Engineering & System Safety, 2019 Novel models of imperfect repair are fitted to classic reliability datasets. The models suppose that a virtual system comprises a component and a remainder in series. On failure of the component, the component is renewed, and on failure of the remainder, the component is renewed\ud and the remainder is minimally repaired.
Ibrahim Nafisah +3 more
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Reducing degradation and age of items in imperfect repair modeling [PDF]
, 2022 We develop new models for imperfect repair and the corresponding generalized renewal processes for stochastic description of repairable items that fail when their degradation reaches the specified deterministic or random threshold.
Finkelstein, Maxim, Cha, Ji Hwan
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Reliability analysis for a k/n(F) system with repairable repair-equipment [PDF]
, 2009 In this paper, the reliability and replacement policy of a k/n(F) (i.e. k-out- of-n: F) system with repairable repair-equipment is analyzed. We assume that both the working and repair times of all components in the system and the repair-equipment follow ...
Zhang, Yuan Lin, Wu, Shaomin
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On the combined imperfect repair process
Probability in the Engineering and Informational Sciences, 2023 AbstractIn this paper, a new point process is introduced. It combines the nonhomogeneous Poisson process with the generalized Polya process (GPP) studied in recent literature. In reliability interpretation, each event (failure) from this process is minimally repaired with a given probability and GPP-repaired with the complementary probability ...
Ji Hwan Cha, Maxim Finkelstein
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System Maintenance Using Several Imperfect Repairs Before a Perfect Repair
, 2021 Allowing several imperfect repairs before a perfect repair can lead to a highly reliable and efficient system by reducing repair time and repair cost. Assuming exponential lifetime and exponential repair time, we determine the optimal probability $p$ of ...
Smithson, Haixia +3 more
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Maintenance Optimization for Repairable Deteriorating Systems under Imperfect Preventive Maintenance
Mathematics, 2019 This study deals with the preventive maintenance optimization problem based on a reliability threshold. The conditional reliability threshold is used instead of the system reliability threshold.
Juhyun Lee, Byunghoon Kim, Suneung Ahn
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Steady-state imperfect repair models
European Journal of Operational Research, 2020 Imperfect maintenance models are widely used in reliability engineering. This paper discusses relevant asymptotic properties for the steady-state virtual age processes. It is shown that the limiting distributions of age, the residual lifetime and the spread that describe an ordinary renewal process can be generalized to the stable virtual age process ...
Xingheng Liu +3 more
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Cost-Benefit Analysis of a Two-Unit Cold Standby System with Imperfect Repair Man and Abnormal Weather Conditions [PDF]
Alfarama Journal of Basic & Applied Sciences, 2023 This study examines the dependability of a cold standby system made up of two similar units. One of the two units is always in use, and the other unit is on cold standby. The repairman could be present or not at the job site.
M. A. Moaz, M. A. W. Mahmoud, aya ali
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