基于混合正态分布提前期内需求和可变提前期的供应链优化

考虑提前期内需求服从混合正态分布且提前期为可变情形下,建立由购买商和供应商所组成的简单供应链的集成优化模型,并设计相应的算法对模型进行求解.结合具体算例对模型进行应用分析,结果表明,模型具有可操作性和实用性.运用算例进行灵敏度分析,结果表明:运输车辆数量、购买商订单成本和购买商单位库存成本对最优提前期的影响不明显;随着运输车辆数量的增加,运输车辆最优载荷量的变化规律不是很明显,但供应链成本却呈现上升趋势;随着购买商订单成本的增加,运输车辆最优载荷量和供应链总成本呈现上升趋势;随着购买商单位时间内单位库存成本的增加,运输车辆最优载荷量呈现下降趋势,供应链总成本呈现上升趋势.

Optimization of supply chain for demand during lead time with mixtures of normal distribution and variable lead time

Considering demand during lead time with mixtures of normal distribution and variable lead time,the integrated optimization model for a supply chain consisted with a buyer and a supplier is developed,and the corresponding algorithm is developed to find the solution to the model.A numerical example is given to demonstrate the effectiveness of the model and perform the sensitivity analysis.It is shown from the analysis that the buyer's optimal order quantity is not sensitive to the number of shipments and the supply chain cost is increasing in the number of shipments;the buyer's optimal order quantity and supply chain cost are increasing in the buyer's order cost;the buyer's optimal order quantity is decreasing in the buyer's unit holding cost and supply chain cost is increasing in the buyer's unit holding cost.