Results 231 to 240 of about 1,587,400 (304)

Optimum Policies for a System with Imperfect Maintenance

IEEE Transactions on Reliability, 1987
This paper considers a system with imperfect maintenance, i.e., after maintenance the system may be either (a) not changed, or (b) failed, with certain probabilities. Formulas for the MTTF and the availability are obtained and the policy to maximize availability is derived. A numerical example applies these results to a triple redundant system.
Nakagawa, Toshio, Yasui, Kazumi
openaire   +2 more sources

A predictive maintenance policy with imperfect monitoring

Reliability Engineering & System Safety, 2010
For many systems, failure is a very dangerous or costly event. To reduce the occurrence of this event, it is necessary to implement a preventive maintenance policy to replace the critical elements before failure. Since elements do not often exhibit incipient faults, they are replaced before a complete exploiting of their useful life.
CURCURU', Giuseppe, GALANTE, Giacomo Maria, LOMBARDO, Alberto   +2 more
openaire   +1 more source

Optimal lot-sizing problem with imperfect maintenance and imperfect production

International Journal of Systems Science, 2004
In this paper, we develop an integrated model for the joint determination of both economic production quantity and level of preventive maintenance (PM) for an imperfect production process. This process has a general deterioration distribution with increasing hazard rate.
Shey-Huei Sheu, Jih-An Chen
openaire   +1 more source

The impact of imperfect maintenance actions on the degradation of buildings’ envelope components

, 2021
Usually, maintenance models consider maintenance actions as perfect, i.e. these interventions can restore the components to the “as good as new” state. However, in many situations, this assumption is too simplistic, and moreover it is not true.
C. Ferreira, A. Silva, J. Brito, I. S. Dias, I. Flores-Colen   +4 more
semanticscholar   +1 more source

On an imperfect preventive maintenance model

International Journal of Quality & Reliability Management, 2000
Presents two sequential preventive maintenance (PM) models. The first model can be viewed as an extension of Nakagawa’s model where the age reduction of the system is assumed to depend on the level of PM activities. Linear and nonlinear relationships between age reduction and PM level have been considered.
M. Ben‐Daya, A.S. Alghamdi
openaire   +1 more source

Imperfect Preventive-Maintenance

IEEE Transactions on Reliability, 1979
This paper considers a periodic preventive maintenance (pm) policy with ``minimal repair'' at failure; pm is imperfect. A special case of failure (hazard) rate improvement is postulated wherein pm reduces the failure rate, but does not return the time origin all the way to zero.
openaire   +2 more sources

Scheduling the Imperfect Maintenance and Replacement of Power Substation Equipment: A Risk-Based Optimization Model

IEEE Transactions on Power Delivery
A proper and effective maintenance and replacement schedule help to restore power equipment health condition, increase cost efficiency, and reduce the failure risk of the power grid.
Nan Zhou, Lingen Luo, G. Sheng, Xiuchen Jiang   +3 more
semanticscholar   +1 more source

Optimizing inspection plan for corroded pipeline with considering imperfect maintenance

Proceedings of the Institution of Mechanical Engineers. Part O, Journal of risk and reliability, 2022
Metal-loss corrosion may result in pipeline’s failure and expensive downtime loss. Thus, to keep the pipeline’s normal operation, it is crucial to draw up scientific inspection and maintenance plans.
Yifei Wang, Chunya Su, Mingjiang Xie
semanticscholar   +1 more source

Optimal maintenance time for imperfect maintenance actions on repairable product

Computers & Industrial Engineering, 2011
This paper develops a maintenance strategy for repairable products that combines imperfect maintenance actions at pre-scheduled times and minimal repair actions for failures. Under a power law process of failures, an expected total cost is developed that involves the sum of the total cost of imperfect preventive maintenances and the expected total cost
Tzong-Ru Tsai, Pang-Hsu Liu, Yuhlong Lio
openaire   +1 more source

Imperfect maintenance policy for a degradation-shock model considering dynamic environment effects and varying failure thresholds

Journal of the Operational Research Society
The maintenance of engineering systems operating in dynamic environments is a challenging task due to the combined effects of natural degradation, random shocks, and evolving environmental conditions.
Bei Wu, Yuxi Mai, Jianwu Xue
semanticscholar   +1 more source