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OPTIMUM ORDERING POLICY FOR PREVENTIVE age replacement

Journal of Systems Science and Systems Engineering 2009年第3期18卷 283-291页

作者： Young T. PARK Jing SUN Department of Systems Management Engineering Sungkyunkwan University School of Economics and Management Tsinghua University Beijing 100084 China

Most of the spare ordering policies treated up to now have assumed that preventive and corrective replacement costs are equal, which implies in essential that there is no significant need for preventive replacement. This paper presents an ordering policy for preventive age replacement with minimal repair. Introducing the replacement, repair, inventory holding and shortage costs, the expected cost rate is derived. A procedure to determine jointly the ordering time for a spare and the preventive replacement time for the operating unit so as to minimize the expected cost rate is proposed. To explain the ordering policy and the optimization procedure, a numerical example is also included.

关键词： Ordering policy spare age replacement minimal repair

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Optimal Preventive Maintenance Policy with Consideration of Production Wait

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Journal of Shanghai Jiaotong university(Science) 2015年第3期20卷 322-325页

作者：王文彬李娉彭锐 Donlink School of Economics and Management University of Science and Technology Beijing

In this paper, we consider the replacement of a single unit with catastrophic failure mode. Besides replaced at a preset time, the unit is also replaced at failure time or if it encounters a production wait and its age has reached a threshold. The joint preventive maintenance interval and threshold optimization problem are formulated with the objective of minimizing the expected cost per unit time in long run. A numerical example is presented to illustrate the applicability of the model.

关键词： preventive maintenance production wait age replacement threshold

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Stochastic Comparisons of Several replacement Policies under Moment Generating Function Order

Stochastic Comparisons of Several Replacement Policies under...

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第四届中国不确定系统年会

作者： Wang Wenxin Department of Applied Mathematics, North China Electric Power University, Baoding 071003, China

＜正＞Let X and Xt denote the lifetime and the residual life at age t ≥ 0 of a system, respectively. X is said to be a NBUMg random variable if Xt is smaller than X in the moment generating function order, i.e., Xt ≤mg X. In this note, under the assumption that the underlying distribution belongs to NBUMg aging class, we make stochastic comparisons between age and block replacement policies.

关键词： age replacement Block replacement NBUMg

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AN OPTIMAL BURN-IN-PREVENTIVE-replacement MODEL ASSOCIATED WITH A MIXTURE DISTRIBUTION

AN OPTIMAL BURN-IN-PREVENTIVE-REPLACEMENT MODEL ASSOCIATED W...

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第四届质量与可靠性国际会议

作者： A.K.S.JARDINE Department of Mechanical ＆ Industrial Engineering University of Toronto 5 King’s College Road Toronto Ontario M5S 3G8 Canada

＜正＞ A mixture arises in a number of situations. A typical situation is that a population is heterogeneous and consists of several subpopulations, which represent mutually exclusive failure modes（usually early failures where the MTTF is"short" and wearout failures where the MTTF is"long" and the hazard rate is increasing.） When the time to failure of a machine follows a mixture distribution, a challenge is how to determine an appropriate operational or/and maintenance policy to reduce the early-phase failures and operational cost. This paper proposes a bum-in and preventive replacement model to jointly optimize the bum-in time and preventive replacement age. A numerical example is also included.

关键词： Mixture distribution burn-in age replacement optimization

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