Dual Sourcing in a Serial System

• 成果类型: Article
• 署名作者: Sapra, Amar
• 署名单位: Indian Institute of Management (IIM System); Indian Institute of Management Bangalore
• 刊物名称: PRODUCTION AND OPERATIONS MANAGEMENT
• ISSN/ISSBN: 1059-1478
• DOI: 10.1111/poms.12778
• 发表日期: 2017
• 页码: 2163-2174
• 关键词: Inventory Management; dynamic programming; Multimodularity; DUAL SOURCING; serial system

摘要

We consider a finite-horizon, periodic-review model for a serial system with two uncapacitated external suppliers. While one external supplier (regular supplier) ships to the most upstream stage, the other one (emergency supplier) ships directly to a downstream stage. For this system, with general lead-times we show that the optimal cost function is multimodular with respect to inventories in transit and inventories at different stages and obtain results that show how the optimal order quantities change with respect to these inventories. Our analysis also leads to sufficient conditions under which modified echelon-basestock-type policies are optimal.