在预报更新的环境下具有两种配送方式的供应链模型

本文研究在预报更新环境下具有快、慢两种配送方式和需求预报更新的库存系统，为了得到更多关于费用参数和预报改进对最优定货量以及最优的平均费用的影响，我们考虑两个周期的情形．以动态规划为工具我们得到了系统的最优策略．对于需求预报服从均匀分布情形，本文得到了最优定货量和最优的平均总费用的精确表达式．我们通过一些数值例子来说明库存费用、罚金、需求的预报改进和预报误差对最优定货量和最优的

A Supply Chain Model with Two Delivery Modes and Forecast Updates

This paper is concerned with a periodic review inventory system with fast and slow delivery modes and regular demand forecast updates. To get more insights about how the cost parameters and the forecast accuracy impact on the optimal order quantities and the optimal expected total cost, we consider the case in which the time horizon equals 2. By using the dynamic programming method the optimal policy is obtained. For uniformly distributed demand forecasts, the explicit expressions of the optimal order quantities and the optimal expected total cost are provided. Several tables and figures are given to more formally illustrate how the holding cost, the penalty cost, the forecasting improvement factors and the forecasting errors vary impact on the optimal order quantities and the optimal expected total cost.