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A note on inventory policies for products with residual-life-dependent demand

机译:关于具有剩余寿命相关需求的产品的库存政策的说明

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We study inventory ordering policies for products that attract demand at a decreasing rate as they approach the end of their usable lifetime, for example, perishable items nearing expiration. We consider the “product freshness’’, or equivalently, the time until expiration (“residual life”) as a factor influencing the customer demand. In a profit-maximizing framework, we build on the Economic Order Quantity (EOQ) replenishment model and formulate the inventory ordering problem using a deterministic demand function that is concave decreasing in the the age of the product. We provide analytical results on the optimal ordering policy, including an explicit characterization of the decisions in the linear-demand case, and we develop an easy-to-implement adaptive heuristic policy for the general case. Numerical examples show that the optimal policy generates significant profit gains compared to the traditional cost-based policies and the adaptive heuristic policy performs highly satisfactorily in the tested instances.
机译:我们研究的是在接近使用寿命的产品(例如,快要到期的易腐物品)时,以较低的速度吸引需求的产品的库存订购策略。我们将“产品新鲜度”(或等同地,直到到期(“剩余寿命”)的时间)视为影响客户需求的因素。在利润最大化的框架中,我们建立在经济订单数量(EOQ)补货模型的基础上,并使用确定性需求函数(在产品使用年限内呈凹状递减)来制定库存订购问题。我们提供了关于最佳排序策略的分析结果,包括对线性需求案例中决策的明确描述,并且针对一般案例开发了易于实现的自适应启发式策略。数值算例表明,与传统的基于成本的策略相比,最优策略产生了可观的利润增长,而自适应启发式策略在测试实例中的表现令人满意。

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