作者:Evelyn Yao 清华大学本科在读
编者按
在“Operations Research近期论文精选”中,我们有主题、有针对性地选择了Operations Research中一些有趣的文章,不仅对文章的内容进行了概括与点评,而且也对文章的结构进行了梳理,旨在激发广大读者的阅读兴趣与探索热情。在本期“论文精选”中,我们以“零售业的未来”为主题,分别探究了自动驾驶的无人零售车配送时的路径规划问题、在线零售时的减缓延迟问题和易腐坏物品的库存管理问题,涉及排队系统、统计学、马尔可夫决策过程等诸多知识。
推荐文章1
发表时间:2022.12.1
● 题目:Stall Economy: The Value of Mobility in Retail on Wheels
摊位经济:零售车移动性的价值
● 期刊:Operations Research
● 原文链接:https://doi.org/10.1287/opre.2022.2404
● 作者:Junyu Cao, Wei Qi
● 关键词:stall economy(摊位经济) • mobile retail(移动零售) • self-driving(自动驾驶) • rendezvous problem (汇合问题)• spatial queues(空间排队)
● 摘要:
Urban open space emerges as a new territory to embrace retail innovations. Selling products in public spaces with wheeled stalls can potentially become ubiquitous in our future cities. Transition into such a “stall economy” paradigm is being spurred by the rapidly advancing self-driving technologies. Motivated by this transformation, this paper provides models, theory, and insights of spatial queueing systems, in which one server moves around to meet mobile customers/machines and in which the “last 100 meters” are expensive. Specifically, we study two service modes: (i) on-demand, first come, first served and (ii) spatially and temporally pooling customer demands. In each mode, we derive the dependence of customer waiting and stall repositioning on two key decisions: the service zone size and the walking distance imposed on customers to meet a stall. In particular, for the on-demand mode, we propose and solve a “rendezvous problem” to analytically characterize the spatial distribution of the stall-customer meeting locations. We also propose a stylized joint truck-stall routing model to capture the inventory replenishment operations. Our main finding is that the stall economy potentially profits more than stationary retail, not only because of the mobility of stalls for providing proximity to customers, but also because of its operational flexibilities that allow for avoiding the “last 100 meters” and pooling demands. In a broader sense, this work looks toward an expanded scope of future retail empowered by self-driving technologies.
城市开放空间正逐渐成为拥抱零售业创新的新领域。使用零售车在城市公共空间销售产品也很可能成为我们未来城市的普遍现象。迅速发展的自动驾驶技术推动着我们向“摊位经济”的过渡,而在这种转变的激励下,本文针对移动零售车的 "最后100米 "问题提供了空间排队系统的模型、理论和见解。具体来说,我们研究了两种服务模式:(i)按需服务,先到先得;(ii)空间和时间上的客户需求集合。在每一种模式中,我们都推导出了顾客等待时间和零售车重定位消耗对于服务区大小和顾客行走距离的依赖性。特别是对于按需服务模式,我们提出并解决了一个 "汇合问题",以分析零售车和顾客汇合地点的空间分布特征。我们还提出了一个库存车和零售车的联合模型,以捕捉库存补货操作。我们的主要发现是,摊位经济有可能比固定的零售业获得更多的利润,这不仅是因为摊位的流动性为顾客提供了近距离的服务,而且还因为其操作的灵活性,可以避免 "最后100米 "的昂贵花费。在更广泛的意义上,这项工作着眼于扩展由自动驾驶技术授权的未来零售业的范围。
● 文章结构:
● 点评:
这篇文章研究无人零售车“最后一公里”配送时的路径规划问题,选题特别新颖。在文章的核心部分中,作者提出了一个十分漂亮的magnet rule,并利用它得到了一种特定的汇合点分布。在文章的section 5.1部分,也把magnet rule 和其他的规则进行了比较(比如straight-ahead rule和two-location clairvoyant等),综合考量得到它是一种十分有效率的规则。在小编与作者交流的过程中,作者提到,在他看来magnet rule的提出是整篇文章最具创造力的地方,不仅如此,作者也希望自己的文章能为大家带来一些启发和新的想法,一起应用理论提高效率,并通过对现实问题的探究反过来推动理论上的创新。
推荐文章2
发表时间:2022.3.14
● 题目:Need for Speed: The Impact of In-Process Delays on Customer Behavior in Online Retail
追求速度:流程中的延迟对客户行为的影响
● 期刊:Operations Research
● 原文链接:https://doi.org/10.1287/opre.2022.2262
● 作者:Santiago Gallino, Nil Karacaoglu, Antonio Moreno
● 关键词:in-process delays (过程中的延迟)• service operations(服务运营) • online retail(在线零售) • website speed(网站速度) • abandonment(弃权)
● 摘要:
The impact of delays has been widely studied in various offline services. The focus of this study is online services, and we explore the impact of in-process delays—measured by website speed—on customer behavior. We leverage novel retail and website speed data to investigate how delays impact online sales and how customer sensitivity to in-process delays varies across the different stages of a customer’s shopping journey. We estimate sizable adverse effects of website slowdowns on online sales. Using threshold regression models, we show that customers exhibit diminishing sensitivity to increases in website slowdowns. Our results suggest that waiting times affect customer abandonment differently at different stages of the shopping journey. Customers are more sensitive to slowdowns at the checkout stage. Our findings have implications for website design decisions such as improving website speed at the checkout stage, selecting third-party content providers, and customizing the design of mobile and desktop channels. The paper’s results are especially relevant in the current regulatory environment with ongoing policy debates about net neutrality.
在各种各样的离线服务中,我们已经广泛的研究了延迟的影响。本次研究的重点是在线服务,我们探讨了”过程中“的延迟对顾客行为的影响(用网站速度来衡量)。我们利用新的零售网站的速度数据来探究”延迟“是如何影响在线销售的,以及在顾客购物的不同阶段,他们对网络延迟的敏感度是怎么变化的。我们的研究估计,网络速度的减慢对于在线销售有相当大的不利影响。通过利用阈值回归模型,我们表明,对于网站延迟速度的增加,顾客表现出来的敏感度是递减的。我们的研究结果表明,在购物旅程的不同阶段,等待时间对于顾客放弃支付的影响是不同的,而顾客对于结账阶段时的网络延迟更加敏感。我们的研究结果对于网站设计的决策会产生影响,比如设计者可以提高结账阶段时的网站运行速度、选择第三方内容供应商,以及定制移动和桌面渠道的设计。尤其是在当前关于网络中立性政策争议不断的监管环境中,我们的研究更有意义。
● 文章结构:
● 点评:
本文聚焦于“网购中网站的延迟时间和顾客交易”的关系展开探究。相比于上一篇文章复杂的推导和漂亮奇妙的法则,本文对于新手而言更加友好。只要具有基础的统计学知识即可充分理解文章的内涵。文章在选题方面发现了从前文献中的gap,实现了对“延迟对在线零售服务影响”相关文献的一些补充。非常适合用来下饭(×)和扩展知识面。
推荐文章3
发表时间:2022.12.23
● 题目:Inventory Sharing for Perishable Products: Application to Platelet Inventory Management in Hospital Blood Banks
易腐产品的库存共享:医院血库中的血小板库存管理
● 期刊:Operations Research
● 原文链接:https://doi.org/10.1287/opre.2022.2410
● 作者:Can Zhang, Turgay Ayer, Chelsea C. White, Joy N. Bodeker, John D. Roback
● 关键词:blood banks(血库) • platelets(血小板) • perishable products (易腐烂产品)• transshipment (转运)• value of inventory sharing(库存共享的价值)
● 摘要:
Platelets are critical blood products. The management of platelet inventory is particularly challenging because of its perishable nature with a short shelf life. Motivated by a platelet inventory management problem at a two-location hospital system, we study how the wastage of platelets and, more broadly, perishable products can be reduced through inventory sharing. In particular, we consider a system with two locations and a single product (e.g., a two-hospital system sharing blood products, such as platelets). Each location faces a stochastic demand, and products can be transshipped from one location to the other after demand realization. At each location, products are issued in a first-in, first-out manner. Although the state of such a complex system consists of the inventory levels of different product ages at both locations, interestingly, we show that the direction of transshipment can be determined by simply comparing the age of the oldest products at each location after meeting demand. Based on this and other structural results, we then prove that a myopic transshipment policy is optimal for a special case motivated by our case study and serves as a lower bound on the optimal transshipment quantity for more general settings. Our analysis also sheds light on how inventory sharing affects the optimal inventory levels for perishable products. Because of its competitive performance and simplicity, our proposed myopic transshipment policy has been implemented by our partner hospital system, which led to a reduction of approximately 20% in platelet outdates.
血小板是重要的血液制品。然而由于血小板的保质期短且易损坏,他的库存管理特别具有挑战性。在一个两地医院系统的血小板库存管理问题的启发下,我们研究了如何通过库存共享减少血小板乃至更广范围内的易腐产品的浪费。特别是,我们考虑一个有两个地点和单一产品的系统(例如,一个能够共享血小板等血液产品的两个医院组成的系统)。每个地点面临着的需求都是随机的,而产品可以在需求实现后从一个地点转运到另一个地点。在每个地点,产品以先入先出的方式发放。尽管这样一个复杂系统的状态是由两个地点中产品年龄不同的库存水平组成,但有趣的是,我们表明转运的方向可以简单地通过比较满足需求后每个地点最老产品的年龄来确定。基于这一点和其他结构性结果,我们随后证明,在我们的案例研究所激发的一个特殊情况下,近视的转运政策是最优的,并且可以作为更普遍情况下最优转运数量的下限。我们的分析还揭示了库存共享是如何影响易腐产品的最佳库存水平的。由于我们提出的方案既简单又具有竞争力,我们提出的近视转运政策目前已经被我们的合作伙伴医院系统实施,而实施后血小板过期率已降低了约20%。
● 文章结构:
● 点评:文章来源:https://www.toymoban.com/news/detail-409976.html
本文探究了两地系统中对于易腐烂物品的库存共享问题,并为之提供了可实施的转运策略。不仅如此,文中的一些见解和发现也同样具有重要的实际意义。比如在存储易腐烂产品的时候,转运应该更频繁地发生等等。在研究方法上,本文基于随机过程建模,并因此推导出了最优策略时的转运方向、最佳转运数量的上下限等性质。如果有对于动态库存管理感兴趣的朋友,欢迎阅读此文。文章来源地址https://www.toymoban.com/news/detail-409976.html
到了这里,关于论文导读|Operations Research近期文章精选:零售业的未来何在?的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章,希望大家以后多多支持TOY模板网!