Results 241 to 250 of about 1,990,178 (318)

Maintenance policies for protection systems with imperfect inspection and imperfect repair

Reliability Engineering and System Safety
In 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
exaly   +9 more sources

Warranty servicing with imperfect repair

International Journal of Production Economics, 2008
A 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.
N Jack, D N P Murthy, Won Young Yun
exaly   +6 more sources

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On the optimal degree of imperfect repair

Reliability Engineering and System Safety, 2015
Abstract A simple cost-wise comparison between the minimal and perfect repair of a system is discussed first using a relevant example. The main focus of this note, however, is on imperfect (general) repair. The best repair for our system in this case is defined as the one that corresponds to the optimal level (extent) of repair actions that minimize ...
Maxim Finkelstein
exaly   +3 more sources

A General Imperfect Repair Model Considering Time-Dependent Repair Effectiveness

IEEE Transactions on Reliability, 2012
Kijima 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
exaly   +4 more sources

On degradation-based imperfect repair and induced generalized renewal processes [PDF]

Test, 2021
In this paper, we suggest and justify a new, basic approach to modelling the imperfect repair and the corresponding imperfect repair processes for items with observable degradation.
Maxim Finkelstein, Ji Hwan Cha, Finkelstein Maxim   +2 more
exaly   +5 more sources

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.
openaire   +4 more sources

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
openaire   +3 more sources

Imperfect repair and lifesaving in heterogeneous populations

Reliability Engineering and System Safety, 2007
In 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
exaly   +2 more sources

Cost evaluation for an imperfect-repair model with random repair time

International Journal of Systems Science, 2005
A 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.
Dong Ho Park
exaly   +2 more sources