...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of production economics >A multiple sourcing inventory model under disruption risk
【24h】

A multiple sourcing inventory model under disruption risk

机译：中断风险下的多源库存模型

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Interruptions in supply can have a severe impact on company performance. Their mitigation and management is therefore an important task. Reasons for interruptions can be machine breakdowns, material shortages, natural disasters, and labour strikes. Sourcing from multiple suppliers is a strategy to deal with and reduce supply disruption risk. We study a supply chain with one buyer facing Poisson demand who can procure from a set of potential suppliers who are not perfectly reliable. Each supplier is fully available for a certain amount of time (ON periods) and then breaks down for a certain amount of time during which it can supply nothing at all (OFF periods). The problem is modeled by a Semi-Markov decision process (SMDP) where demands, lead times and ON and OFF periods of the suppliers are stochastic. The objective is to minimize the buyer's long run average cost, including purchasing, holding and penalty costs. In a numerical study, we investigate the trade-off between single and multiple sourcing, as well as keeping inventory and having a back-up supplier. The results illustrate the benefit from dual souring compared to single sourcing and show the influence of the suppliers' characteristics cost, speed and availability on the optimal policy. Further, the value of full information about the supplier status switching events is analyzed and the performance of the optimal policy is compared to an order-up-to-S policy. As the optimal policy is very complex, a simple heuristic providing good results compared to the optimal solution is developed.
机译：供应中断会严重影响公司绩效。因此，缓解和管理它们是一项重要任务。中断的原因可能是机器故障，材料短缺，自然灾害和罢工。从多个供应商处采购是一种应对并降低供应中断风险的策略。我们研究的供应链中有一个面对泊松需求的买家，该买家可以从一组不太可靠的潜在供应商那里采购。每个供应商都可以在一定时间（“接通”时间段）内完全可用，然后在一定时间段内崩溃，在此期间根本无法供应任何东西（“断开”时间段）。该问题是通过半马尔可夫决策过程（SMDP）建模的，其中需求，提前期以及供应商的ON和OFF期间都是随机的。目的是最大程度地减少买方的长期平均成本，包括采购，持有和罚款成本。在一项数值研究中，我们研究了单次采购和多次采购之间的权衡，以及保持库存和拥有备用供应商。结果说明了与单一采购相比双重采购的好处，并显示了供应商的特征成本，速度和可用性对最优策略的影响。此外，将分析有关供应商状态切换事件的全部信息的价值，并将最佳策略的性能与“按订单上岗”策略进行比较。由于最优策略非常复杂，因此开发了一种与最优解决方案相比可提供良好结果的简单启发式方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号