Updating Inventories of Substitutable Resources in Response to Forecast Updates
研究了在需求均值预测更新时，如何简单且最优地更新可替代资源的库存水平、预期利润、满足率和服务水平，发现一种资源的需求均值变化不影响其他资源的最优库存水平。
We show simple yet optimal results to update the inventory/capacity levels, expected profit, fill rates, and service levels of substitutable resources in response to an updating of the mean demand forecasts for the resources. We find that a change in the mean demand of one resource does not affect the optimal inventory level of any other resource. The results are obtained for demands with location‐scale distribution, and for a revenue structure satisfying a triangle property such that the manager will always use the inventory of a resource to meet her own demand first before using it for substitution. The results for updating the performance measures also extend to managers who maintain non‐optimal inventory/capacity levels. Implications for procurement, sales and operational planning, and multi‐store operations are discussed.