Results 221 to 230 of about 15,461 (258)

Multivariate age‐dependent imperfect repair

Naval Research Logistics (NRL), 1991
AbstractIn 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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DISCRETE REPAIR-COST LIMIT REPLACEMENT POLICIES WITH/WITHOUT IMPERFECT REPAIR [PDF]

Asia-Pacific Journal of Operational Research, 2008
This paper addresses statistical estimation problems of the optimal repair-cost limits minimizing the long-run average costs per unit time in discrete seting. Two discrete repair-cost limit replacement models with/without imperfect repair are considered.
Kazuki Iwamoto, Tadashi Dohi, Naoto Kaio
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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 ...
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A repairable system with imperfect coverage and reboot

Applied Mathematics and Computation, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jau-Chuan Ke, Tzu-Hsin Liu
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Repair-Limit Risk-Free Warranty Policies With Imperfect Repair

IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans, 2005
The current competitive market environment requires manufacturers to continuously provide better service and support. As a result, warranty considerations emerge as a significant instrument for increasing product marketability. In this paper, we propose a new warranty policy, the repair-limit risk-free warranty with a threshold point on the number of ...
Jun Bai, Hoang Pham
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Repairs under imperfect information

Journal of Urban Economics, 2013
Abstract We propose a theory of how repairs affect prices under imperfect information. Our model reveals that repairs may lower prices because, if repairs are not always successful, they may reveal negative information about product quality. We also show that the price effect of repairs is increasing in the share of defective products in the ...
Sanghoon Lee, John Ries, C. Tsuriel Somerville   +2 more
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A graphical method to repair-cost limit replacement policies with imperfect repair

Mathematical and Computer Modelling, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tadashi Dohi, S Osaki
exaly   +3 more sources

Bayesian imperfect repair model

Communications in Statistics - Theory and Methods, 1998
An imperfect repair model proposed by Brown and Proschan(J. Appl. Prob. 20. 1983) is extended in this paper. We propose a new Bayesian imperfect repair model where the probability of perfect repair, P, is considered to be a random variable. Assuming that P has a prior distribution Π(p), we obtain the distribution of waiting times between two successive
Jae-Hak Lim, Kun-Liang Lu, Dong Ho Park
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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   +2 more sources

Availability of Large Scale Repairable Systems with Imperfect Repair

International Journal of Operations Research and Information Systems, 2014
Operational systems consist of components that deteriorate and eventually fail. Upon failure, components are either repaired or replaced. Cheap and critical components are usually replaced, while expensive and non-critical ones are repaired before replacement. In this research work, repairable systems undergoing imperfect repair are examined where upon
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