-
作者：Zhu, Han; Chen, Youhua (Frank); Hu, Ming; Yang, Yi
作者单位：Dongbei University of Finance & Economics; City University of Hong Kong; University of Toronto; Zhejiang University
摘要：We study a continuous-review, two-echelon inventory system with one central warehouse, multiple local facilities, and each facility facing random demand. Local facilities replenish their stock from the central warehouse (or distribution center), which in turn places orders at an outside supplier with ample supply. Inventory replenishment at each location incurs a fixed-plus-variable cost for each shipment. The optimal policy remains unknown, and even if it exists, such a policy must be extreme...
-
作者：Shi, Pengyi; Helm, Jonathan E.; Deglise-Hawkinson, Jivan; Pan, Julian
作者单位：Purdue University System; Purdue University; Indiana University System; IU Kelley School of Business; Indiana University Bloomington
摘要：When to discharge a patient plays an important role in hospital patient flow management and the quality of care and patient outcomes. In this work, we develop and implement a data-integrated decision support framework to aid hospitals in managing the delicate balance between readmission risk at discharge and ward congestion. We formulate a large-scale Markov decision process (MDP) that integrates a personalized readmission prediction model to dynamically prescribe both how many and which patie...
-
作者：de Kemp, A. Madelon; Mandjes, Michel; Olver, Neil
作者单位：University of Amsterdam; University of London; London School Economics & Political Science
摘要：A classic problem in appointment scheduling with applications in healthcare concerns the determination of the patients' arrival times that minimize a cost function that is a weighted sum of mean waiting times and mean idle times. One aspect of this problem is the sequencing problem, which focuses on ordering the patients. We assess the performance of the smallest-variance-first (SVF) rule, which sequences patients in order of increasing variance of their service durations. Although it is known...
-
作者：Chan, Carri W.; Huang, Michael; Sarhangian, Vahid
作者单位：Columbia University; University of Toronto
摘要：Many service systems are staffed by workers who work in shifts. In this article, we study the dynamic assignment of servers to different areas of a service system at the beginning of discrete time intervals, namely, shifts. The ability to reassign servers at discrete intervals, rather than continuously, introduces a partial flexibility that provides an opportunity for reducing the expected waiting time of customers. The problem is primarily motivated by an application to nurse staffing in emer...
-
作者：Liesio, Juuso; Vilkkumaa, Eeva
作者单位：Aalto University
摘要：Portfolio decision analysis models support selecting a portfolio of projects in view of multiple objectives and limited resources. In applications, portfolio utility is commonly modeled as the sum of the projects' multiattribute utilities, although such approaches lack rigorous decision-theoretic justification. This paper establishes the axiomatic foundations of a more general class of multilinear portfolio utility functions, which includes additive and multiplicative portfolio utility functio...
-
作者：Cao, Ping; He, Shuangchi; Huang, Junfei; Liu, Yunan
作者单位：Chinese Academy of Sciences; University of Science & Technology of China, CAS; National University of Singapore; Chinese University of Hong Kong; North Carolina State University
摘要：There are two basic queue structures commonly adopted in service systems: the pooled structure, where waiting customers are organized into a single queue served by a group of servers, and the dedicated structure, where each server has her own queue. Although the pooled structure, known to minimize the servers' idle time, is widely used in large-scale service systems, this study reveals that the dedicated structure, along with the join-the-shortest-queue routing policy, could be more advantageo...
