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 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。
