共查询到17条相似文献,搜索用时 250 毫秒
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基于动态联盟的虚拟企业的库存控制策略 总被引:1,自引:0,他引:1
为实现多企业多仓库的资源共享和库存控制,提出了基于动态联盟的虚拟企业的库存控制模式.企业间通过虚拟库存协调中心的协商,实现联合订货和仓库间的调拨.为了对不同库存控制策略进行仿真,提出了基于仿真的多企业库存调拨问题的优化方法,求解各仓库的订货点和期望的补货水平等参数.该方法由仿真模型和优化模块组成,通过多次迭代,获取最优的订货点和期望的补货水平方案.最后,以三个厂商七个仓库为例,验证了方法的可行性和有效性. 相似文献
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一类库存控制系统的稳定性分析 总被引:3,自引:1,他引:3
为了克服供应链系统存在的供货提前期、供货数量、价格等不确定以及市场环境多变的困难,保证供应链系统的库存稳定,建立了在一类改进的最大库存策略下一级库存控制系统的状态空间模型,针对不同的提前期,根据离散控制系统原理结合非线性系统的分析方法,给出了使系统稳定的订货策略参数的取值范围,并对之进行了仿真试验。结果表明,在最大库存策略下,系统的结构稳定性主要由订货决策的参数决定,与外部需求无关,而决策参数选取不当会使系统行为出现混沌等复杂现象。仿真显示,这些现象可使系统有较大的库存偏差,从而导致库存及相关费用的增加,表明稳定性对降低供应链系统的费用、提高其性能有重要意义。 相似文献
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为研究含有单制造商和多零售商的供应网络中基于订单延迟经济生产批量模型的订货库存联合优化问题,以明确联盟博弈和模糊联盟博弈分别研究该供应链在确定和模糊环境下的最优订货/库存策略.证明了有限信息共享时的订货成本博弈和深度信息共享时的存货(及缺货)成本博弈的联盟稳定性和解的存在性.解析和仿真分析表明,扩充Shapley值较比例法则在成本分摊上更为合理,当联合订货分散存货策略转变为集中存货策略时,仅有前者能实现成本分摊的Pareto改进.进而构建联合订货模糊联盟博弈,证明该模糊联盟的核非空,给出模糊Shapley值作为模糊博弈的合理成本分摊方案,并以数值算例演示和验证了解的有效性.最后给出未来的研究方向. 相似文献
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针对企业传统库存局部优化存在的不足,以一个分销中心与多个零售商组成的二级供应链为对象建立系统库存成本优化模型。市场需求服从正态分布,综合考虑安全因子与服务水平,以订货成本、库存持有成本和缺货成本为系统库存成本,求解总成本最低的优化方案。最后,通过实例验证表明分销中心与零售商合作时库存总成本比不合作时明显降低。 相似文献
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研究了传统零售商管理库存模式下,基于确定需求的由一个供应商多个零售商组成的两级配送系统中作业层库存路径问题.首先采用传统C-W节约算法,讨论了供应商和零售商独立决策时的订货与配送策略.然后基于时间距离的思想,在滚动周期策略的框架下,设计了两级系统的联合配送策略.最后,用具体算例比较了独立决策和联合决策下的系统年度费用,验证了联合配送策略的有效性,并给出了相应的作业层日常运营补货时间和车辆路径. 相似文献
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Mostafa Hajiaghaei-Keshteli Seyyed Mehdi Sajadifar Rasoul Haji 《The International Journal of Advanced Manufacturing Technology》2011,55(5-8):831-841
In this work, we consider a three-echelon serial inventory system with two warehouses (suppliers) and one retailer with information exchange. The retailer applies continuous review (R, Q) policy. The warehouses have online information on the inventory position and demand activities of the retailer. We present a new ordering policy to share information among inventory echelons. The warehouse I and II start with m 1 and m 2 initial batches of the same order size of the retailer, respectively. The warehouse I places an order to an outside source immediately after the retailer’s inventory position reaches an amount equal to the retailer’s order point plus a fixed value s 1, and the warehouse II places an order to the warehouse I immediately after the retailer’s inventory position reaches an amount equal to the retailer’s order point plus a fixed value s 2. Transportation times are constant and the retailer faces independent Poisson demand. The lead times of the retailer and the warehouse II are determined not only by the constant transportation time but also by the random delay incurred due to the availability of stock at the warehouses. In this paper using the idea of the one-for-one policy, we implicitly incorporate the distribution function of the random delay to obtain the exact value of the expected inventory system cost. Resorting some numerical examples in three different scenarios, we show how information sharing reduces the inventory costs. 相似文献
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Mostafa Hajiaghaei-keshteli Seyyed Mehdi Sajadifar 《The International Journal of Advanced Manufacturing Technology》2010,50(1-4):343-351
A three-echelon inventory system with two warehouses and N-retailers is considered in this paper. Transportation times are constant and retailers face independent Poisson demand. Replenishments are one-for-one. The lead time of a retailer is determined not only by the constant transportation time but also by the random delay incurred due to the availability of stock at the warehouses. Axsäter [2] evaluated the value of the expected two-echelon inventory system cost with the same assumptions, but in this paper, we add a warehouse as third echelon and therefore this may lead to having one more delay in shipment which was incurred in the new warehouse. We obtained the cost function for the inventory system and tested it by several examples. 相似文献
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备件库存控制方法研究 总被引:16,自引:1,他引:16
在分析了备件库存控制重要性的前提下,以ABC,库存控制法和备件“3A”库存控制方法为基础,提出了备件ABCD库存控制方法。该库存控制方法以备件对生产状况影响程度、故障损耗规律和供应渠道的敏捷程度等为分类标准,对各类备件分别采取适当的控制策略,最终达到在使备件供应及时充足的前提下,备件库存占用资金最低的库存控制目标。最后,给出了某车身厂企业资源计划系统中该模块的软件实现。 相似文献
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Xinghui Zhang Jianshe Kang Jinsong Zhao Hongzhi Teng 《Journal of Mechanical Science and Technology》2014,28(10):3909-3915
This paper investigates a discrete event simulation approach for managing performance based contracts of repairable systems. We focus on an integrated service delivery environment where the manufacturer develops capital-intensive systems and also provides after-sales support. We propose a simulation model to calculate system availability comprehending four performance drivers: life time distribution, repair time distribution, spare parts inventory, and repair facility. This simulation model allows the service supplier to minimize the total cost by optimizing the four performance drivers. In this simulation model, the failure time and repair time can follow arbitrary distribution. This will allow the customer to monitor the supplier’s service through comparing the actual availability and its theoretical value. The costs of three maintenance policies also can be studied under the performance based contracts framework. Two cases are considered in this paper. One is a system containing single unit, one warehouse, and one repair center. Another is a system containing two fleets with different installed units, two spare part warehouses with one for each fleet, and a central repair depot. 相似文献