论文标题
通过库存投影有效的双源
Effective Dual-Sourcing Through Inventory Projection
论文作者
论文摘要
我们在定期审查下考虑了一个单核管库存系统，两名面临随机需求的供应商，在这种需求中，在这种情况下要求过多的需求。加急供应商的交货时间比常规供应商短，但收取更高的单位价格。我们介绍了预计的加急库存状况（PEIP）政策，我们表明，当短缺成本和加急单位的成本保费都大，其比率保持稳定时，本政策每期的长期平均成本与最佳政策之间的相对差异将其收敛到零。这种结果的必然是，在这种非平凡的制度中，几种现有的启发式方法在渐近上也是最佳的。我们通过广泛的数值调查表明，PEIP政策的表现优于目前在文献中表现最好的启发式政策。
We consider a single-echelon inventory system under periodic review with two suppliers facing stochastic demand, where excess demand is backlogged. The expedited supplier has a shorter lead time than the regular supplier but charges a higher unit price. We introduce the Projected Expedited Inventory Position (PEIP) policy, and we show that the relative difference between the long run average cost per period of this policy and the optimal policy converges to zero when both the shortage cost and the cost premium for expedited units become large, with their ratio held constant. A corollary of this result is that several existing heuristics are also asymptotically optimal in this non-trivial regime. We show through an extensive numerical investigation that the PEIP policy outperforms the current best performing heuristic policies in literature.
