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Discrete Time Age Replacement Policies
Journal of the Operational Research Society, 1977Age replacement problems were discussed by Barlow and Proschan in 1965 and based on continuous time failure distributions. The aims in this tutorial note are (1) to convert a typical age replacement model to a model in discrete time, and (2) to extend it to a similar model with discounting.
Nakagawa, Toshio, Osaki, Shunji
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National Institute Economic Review, 1964
This note presents the results of a questionnaire enquiry into replacement policies used in a sample of firms, mainly in the engineering industry.The enquiry was made as one part of a study of strategic factors in economic growth. This broader study has been focussed on the question : what factors influence the pace at which new and more efficient ...
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This note presents the results of a questionnaire enquiry into replacement policies used in a sample of firms, mainly in the engineering industry.The enquiry was made as one part of a study of strategic factors in economic growth. This broader study has been focussed on the question : what factors influence the pace at which new and more efficient ...
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2017
To begin with, this chapter gives three standard replacement models that have been obtained as basic replacement policies for an operating unit with shock and damage (Nakagawa Shock and damage models in reliability theory. Springer, London, [2].
Xufeng Zhao, Toshio Nakagawa
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To begin with, this chapter gives three standard replacement models that have been obtained as basic replacement policies for an operating unit with shock and damage (Nakagawa Shock and damage models in reliability theory. Springer, London, [2].
Xufeng Zhao, Toshio Nakagawa
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Modified age replacement policies
International Journal of Systems Science, 1990Modified age replacement policies, where a system is not always as good as new after each maintenance, are discussed. The expected total discounted cost for an infinite time-span, introducing some costs and a continuous type discount rate is applied as a criterion of optimality, and the optimum policies minimizing this cost are obtained.
NAOTO KAIO, SHUNJI OSAKI
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2017
In theory, a new counter approach of whichever triggering event occurs last for the replacement policy with two PR scenarios should be considered rather than only the approach of whichever triggering event occurs first in Chap. 2 has been applied.
Xufeng Zhao, Toshio Nakagawa
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In theory, a new counter approach of whichever triggering event occurs last for the replacement policy with two PR scenarios should be considered rather than only the approach of whichever triggering event occurs first in Chap. 2 has been applied.
Xufeng Zhao, Toshio Nakagawa
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A Generalized Block-Replacement Policy
IEEE Transactions on Reliability, 1981Two modes of system failure are possible: Mode 1 is removed by minimal repair, mode 2 by replacement. A generalized block replacement policy is introduced. The long-run cost rate is given. Integral equations of the renewal type for the basic reliability expressions are derived. A numerical example is presented.
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Replacement Policies under Minimal Repair
Journal of the Operational Research Society, 1981In many situations where system failures occur the concept of ‘minimal repair’ is important. A minimal repair occurs when the failed system is not treated so as to return it to ‘as new’ condition but is instead returned to the average condition for a working system of its age.
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Aircraft replacement and tariff policy
International journal of transport economics, 2006This goal of this paper is to define the optimal tariffs policy and resulting schedule of replacement of aircraft for meeting the travel demand at each moment in time when the actual transport capacity decreases due to the physical deterioration of aircraft.
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IEEE Transactions on Reliability, 1993
Two replacement policies that can be used in deciding whether one should replace or repair a system are investigated. The first is a local policy where a decision is made based on average lifetime per unit cost of repair. The second is a global policy. Mathematical properties of these policies are developed, and some examples show that the two policies
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Two replacement policies that can be used in deciding whether one should replace or repair a system are investigated. The first is a local policy where a decision is made based on average lifetime per unit cost of repair. The second is a global policy. Mathematical properties of these policies are developed, and some examples show that the two policies
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Journal of Applied Probability, 1969
The block replacement policy, wherein items are replaced at regular intervals of time and on failure, is rather wasteful because sometimes almost new items are also removed. As an alternative a policy of replacement by new items at regular intervals of time and by used items on failure, is suggested.
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The block replacement policy, wherein items are replaced at regular intervals of time and on failure, is rather wasteful because sometimes almost new items are also removed. As an alternative a policy of replacement by new items at regular intervals of time and by used items on failure, is suggested.
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