共查询到18条相似文献,搜索用时 62 毫秒
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研究了两种可替代物品的经济订货批量问题.在计划期内,若某一种物品发生缺货,则可以被另一种物品以一定的替代率代替补充,以库存系统的总费用最小为目标函数,证明了最优策略存在的唯一性,并给出了求解最优订购策略的算法,最后通过两个算例验证了算法的最优性. 相似文献
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本文针对一般的时变需求与两个货栈,建立了变质性物品的最优确定性EOQ模型,提供了用来寻求最优补充策略的方法,并步线性需求出示了两个数值例子。 相似文献
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带有两货栈及时变需求的变质性物品的最优EOQ模型(英) 总被引:3,自引:0,他引:3
本文针对一般的时变需求与两个货栈(自己货栈和租用货栈),建立了变质性物品的最优确定性EOQ模型,提供了用来寻求最优补充策略的方法,并就线性需求出示了两个数值例子. 相似文献
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允许延期付款条件下的经济订货批量 总被引:1,自引:0,他引:1
本文给出了在允许延期付款条件下的经济订货批量模型.该条件假设:供方允许需方在接到订货后先支付B倍的订货货款(0≤B≤1),剩下的(1-B)倍的贷款可延迟T_c时间付款.最后给出了应用的例子.本文的结论包括了文献[1]和[2]的结果,且更具有一般性和通用性. 相似文献
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本文考虑了多种变质性物品在同一台设备上生产的最优基本生产周期问题。本文采用了基本周期法,给出了问题的数学模型,分析了模型最优解的存在性,并给出了求解该模型的算法和算例,从算例的结果说明基本周期法比公共周期法解决经济批量问题更优。 相似文献
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爆炸物品在储存过程中存在发生爆炸事故,从而给人类和环境带来伤害的可能,因此在对爆炸物品进行采购决策时必需考虑由此带来的风险损失.在给出爆炸物品事故风险损失度量方法的基础上,建立了爆炸物品的经济订货批量模型,证明了模型存在唯一最优解,并给出了模型的求解步骤,为相关企业合理制定采购决策提供了理论依据.数字算例分析了事故概率、赔偿标准、单位库存费、单次采购费对最优批量的影响,比较了考虑事故风险损失与否时的最优批量,结果表明,当事故概率或赔偿标准较高时,两者对应的最优批量差异明显.这也说明,当事故概率或赔偿标准达到一定程度时,考虑事故风险损失是十分必要的. 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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Moncer Hariga 《The Journal of the Operational Research Society》1996,47(10):1228-1246
In this paper, optimal inventory lot-sizing models are developed for deteriorating items with general continuous time-varying demand over a finite planning horizon and under three replenishment policies. The deterioration rate is assumed to be a constant fraction of the on-hand inventory. Shortages are permitted and are completely backordered. The proposed solution procedures are shown to generate global minimum replenishment schedules for both general increasing and decreasing demand patterns. An extensive empirical comparison using randomly generated linear and exponential demands revealed that the replenishment policy which starts with shortages in every cycle is the least cost policy and the replenishment policy which prohibits shortages in the last cycle exhibited the best service level effectiveness. An optimal procedure for the same problem with trended inventory subject to a single constraint on the minimum service level (maximum fraction of time the inventory system is out of stock during the planning horizon) is also proposed in this paper. 相似文献
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针对有保质期约束的非即时易腐品,零售商可以在产品非腐败阶段和腐败阶段进行差异化定价来调整市场需求。即零售商可以调整产品非腐败阶段的定价策略,使得非即时易腐品在进入腐败阶段之前全部售出;或者在产品腐败阶段降低零售价格以刺激市场需求。因此,在需求依赖价格的假设下,本文研究了零售商关于有保质期约束的非即时易腐品的最优订购与定价决策。通过分析零售商单位时间利润函数的理论性质,得到了零售商的最优订购与定价策略。基于线性和指数型两种需求函数形式进行数值算例,可以发现针对保质期较长或者非腐败阶段较长的易腐品,零售商会延长订货周期来增加销售收入。特别是在指数型需求函数情境下,当市场需求与零售价格高度相关时,零售商更有意愿降价来刺激销量,从而使得易腐品在非腐败阶段内销售完毕。 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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Optimal Ordering Policy for Deteriorating Items with Partial Backlogging under Permissible Delay in Payments 总被引:1,自引:0,他引:1
In 1985, Goyal developed an Economic order quantity (EOQ) model under conditions of permissible delay in payments. Jamal et
al. then generalized Goyal’s model for deteriorating items with completely backlogging. However, they only ran several simulations
to indicate that the total relevant cost may be convex. Recently, Teng amended Goyal’s model by considering the difference
between unit price and unit cost, and provided an alternative conclusion that it makes economic sense for some retailers to
order less quantity and take the benefits of the permissible delay more frequently. However, he did not consider deteriorating
items and partial backlogging. In this paper, we establish a general EOQ model for deteriorating items when the supplier offers
a permissible delay in payments. For generality, our model allows not only the partial backlogging rate to be related to the
waiting time but also the unit selling price to be larger than the unit purchase cost. Consequently, the proposed model includes
numerous previous models as special cases. In addition, we mathematically prove that the total relevant cost is strictly pseudo-convex
so that the optimal solution exists and is unique. Finally, our computational results reveal six managerial phenomena. 相似文献