共查询到20条相似文献,搜索用时 15 毫秒
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研究了易变质产品的可替代库存模型.在有限计划期内,供应商面临两种不同产品的需求,当一种产品发生短缺时,另一种产品可以以一定的替代率代替短缺产品.通过分析系统的总成本函数的性质,提出了最优订购策略.最后通过算例验证了算法的最优性. 相似文献
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T. P. M. Pakkala K. K. Achary 《The Journal of the Operational Research Society》1991,42(12):1117-1122
In this paper an order-level probabilistic inventory model for deteriorating items with two warehouses is developed. It is assumed that the production rate is infinite and shortages are allowed. The rates of deterioration of items in the two warehouses are different. Also, a single-warehouse version for deteriorating items is discussed. This paper also considers a two-warehouse model for non-deteriorating items. An illustrative example offers a comparative study of the optimum cost for varying shortage cost. 相似文献
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In this paper an attempt has been made to generalise Dave's results on an inventory model for deteriorating items. He has derived the results for optimal order level and lot size, considering a deterministic constant demand throughout the scheduling period. Here, a variable known demand is taken to show that the optimality conditions for the optimal initial stock do not depend on the nature of the demand. A numerical example is used to illustrate the analysis. 相似文献
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Upendra Dave 《The Journal of the Operational Research Society》1979,30(4):349-354
An Order-Level inventory model continuous in units and discrete in time is developed for deteriorating items. The model is developed under deterministic demand and instantaneous delivery. Deterioration is assumed to be a constant fraction of the onhand inventory. An example is given to illustrate the model. 相似文献
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考虑时值及通货膨胀率的多阶段变质性物品最优库存模型 总被引:2,自引:0,他引:2
本文考虑了时值及通货膨胀率下,部分短缺量拖后的变质性物品最优订购问题。在假定变质率为常数和短缺期间损失率与实际缺货量成正比的前提下,给出了寻找最优订购策略的算法,并且证明了在该策略下费用函数取得最小值。最后给出数字实例以说明本模型及求解过程。 相似文献
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本文在考虑需求率服从斜坡型分布的情况下,研究了允许缺货且缺货完全回补、变质率服从威布尔分布、补货率为无穷、有限计划期内的库存模型,证明了最优补货策略的存在性,并给出了求解最优补货策略的算法. 相似文献
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目前众多的信用交易模型是在供应商给定的信用交易期限条件下,零售商确定最优订购数量或订购周期,而很少考虑供应商信用交易策略的制定问题。本文针对损耗性物品,在最终需求为价格的线性函数条件下,利用斯坦博格博弈模型给出了信用交易下供应商信用交易策略的制定和零售商的最优订购决策,最后通过算例对模型进行了验证。 相似文献
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基于时变需求的库存问题一直是库存管理者关注的重点之一,大多数基于二层信用支付的库存模型都是假设需求率为常数.假设需求率是时间的指数函数,建立了二层信用支付条件下的变质物品库存模型,并证明了最优解是存在且唯一的,给出了确定最优补货策略的算法步骤,最后通过数值例子对主要参数进行了灵敏度分析. 相似文献
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具有库存损耗且允许缺货的EOQ模型 总被引:2,自引:0,他引:2
提出了一种库存损耗量随时间和库存量变化,且允许缺货的EOQ模型,证明了该模型的平均总费用函数在给定条件下为凸函数,并讨论了模型的最优策略及近似解. 相似文献
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研究了在不允许缺货情况下需求为离散的变质性物品的库存补充策略问题.在假定变质率为常数的情况下,建立了有限时域内变质性物品的补充策略模型,并给出了求最优补充策略的方法. 相似文献
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Lakdere Benkherouf Mohammed G. Mahmoud 《The Journal of the Operational Research Society》1996,47(1):188-200
In this paper we present an exact solution for the inventory replenishment problem with shortages, in which items are deteriorating at a constant rate. The demand rates are increasing with time over a known and finite planning horizon. We also present a dynamic programming solution to the problem. Both these methods provide a net improvement over existing methods. 相似文献
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Moncer Hariga 《The Journal of the Operational Research Society》1995,46(3):398-404
In a recent paper, Goswami and Chaudhuri considered the inventory replenishment problem for a deteriorating item with linearly time-varying demand, finite shortage cost, and equal replenishment intervals. The analysis contained mathematical errors. The present paper proposes the correct theory for this problem. Numerical examples are included. 相似文献
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线性需求合并短缺的变质性物品的生产——库存模型 总被引:1,自引:0,他引:1
本文发展了线性需求合并短缺的变质性物品的生产——库存模型,以系统平均总费用最小为目标,提供了有限计划期内的生产调整策略以便适应市场需求的变化.同时还提供了无短缺情形的相应模型,最后出示了一些数字例子 相似文献