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作者：Barz, Christiane; Kolisch, Rainer
作者单位：University of California System; University of California Los Angeles; Technical University of Munich
摘要：We formulate a discrete time Markov decision process for a resource assignment problem for multi-skilled resources with a hierarchical skill structure to minimize the average penalty and waiting costs for jobs with different waiting costs and uncertain service times. In contrast to most queueing models, our application leads to service times that are known before the job is actually served but only after it is accepted and assigned to a server. We formulate the corresponding Markov decision pr...
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作者：Huang, Tingliang; Van Mieghem, Jan A.
作者单位：University of London; University College London; Northwestern University
摘要：We consider firms that feature their products on the Internet but take orders offline. Click and order data are disjoint on such non-transactional websites, and their matching is error-prone. Yet, their time separation may allow the firm to react and improve its tactical planning. We introduce a dynamic decision support model that augments the classic inventory planning model with additional clickstream state variables. Using a novel data set of matched online clickstream and offline purchasin...
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作者：Buyukkaramikli, Nasuh C.; Gurler, Ulku; Alp, Osman
作者单位：Eindhoven University of Technology; Ihsan Dogramaci Bilkent University; Ted University
摘要：In this study, we consider the integrated inventory replenishment and transportation operations in a supply chain where the orders placed by the downstream retailer are dispatched by the upstream warehouse via an in-house fleet of limited size. We first consider the single-item single-echelon case where the retailer operates with a quantity based replenishment policy, (r,Q), and the warehouse is an ample supplier. We model the transportation operations as a queueing system and derive the opera...
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作者：Chen, Lijian; Li, Shanling; Wang, Letian
作者单位：West Virginia University; McGill University; Deutsche Bank
摘要：The authors of this article outline a capacity planning problem in which a risk-averse firm reserves capacities with potential suppliers that are located in multiple low-cost countries. While demand is uncertain, the firm also faces multi-country foreign currency exposures. This study develops a mean-variance model that maximizes the firm's optimal utility and derives optimal utility and optimal decisions in capacity and financial hedging size. The authors show that when demand and exchange ra...
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作者：Wang, Haifeng; Liang, Xiaoying; Sethi, Suresh; Yan, Houmin
作者单位：International Business Machines (IBM); IBM China; City University of Hong Kong; University of Texas System; University of Texas Dallas
摘要：We propose a model where customers are classified into two groups: short lead-time customers who require the product immediately and long lead-time customers to whom the supplier may deliver either immediately or in the next cycle. Unmet orders are backlogged with associated costs. Specifically, the supplier faces two problems: how the on-hand inventories should be allocated between the two classes of customers and how the backlogged orders should be cleared when replenishments arrive. We trea...
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作者：Bendoly, Elliot; Swink, Morgan; Simpson, Wendell P., III
作者单位：Emory University; Texas Christian University
摘要：Project switching occurs when a multi-project worker shifts his/her attention from one project to another before completing the first project. In this study, we study the effects of two areas of management policy on project switching behavior, project prioritization, and work monitoring. We conduct a controlled experiment to evaluate direct and combined effects of prioritization, scheduled progress checks, and managerial progress checks on project switching behavior in a distributed, multi-pro...
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作者：Gallego, Guillermo; Wang, Ruxian; Ward, Julie; Hu, Ming; Beltran, Jose Luis
作者单位：Columbia University; Johns Hopkins University; Hewlett-Packard; University of Toronto
摘要：Frequent technological innovations and price declines adversely affect sales of extended warranties (EWs) as product replacement upon failure becomes an increasingly attractive alternative. To increase sales and profitability, we propose offering flexible-duration EWs. These warranties can appeal to customers who are uncertain about how long they will keep the product as well as to customers who are uncertain about the product's reliability. Flexibility may be added to existing services in the...
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作者：Gilbert, Stephen M.; Randhawa, Ramandeep S.; Sun, Haoying
作者单位：University of Texas System; University of Texas Austin; University of Southern California; Texas A&M University System; Texas A&M University College Station; Mays Business School
摘要：We consider a setting in which consumers experience distinct instances of need for a durable product at random intervals. Each instance of need is associated with a random utility and the consumers are differentiated according to the frequency with which they experience such instances of need. We use our model of consumer utility to characterize the firm's optimal strategy of whether to sell, rent, or do a combination of both in terms of the transaction costs and consumers' usage characteristi...
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作者：Ho, Teck-Hua; Su, Xuanming; Wu, Yaozhong
作者单位：National University of Singapore; University of California System; University of California Berkeley; University of Pennsylvania; National University of Singapore
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作者：Lu, Ye; Song, Miao
作者单位：City University of Hong Kong; University of Hong Kong
摘要：This paper studies the optimal policy for a periodic-review inventory system in which the production costs consist of a fixed cost and a piecewise linear convex variable cost. Such a cost function can arise from alternate sources of supply or from the use of overtime production. We fully characterize the structure of the optimal policy for the single-period problem. For the multi-period problem, the optimal policy can have disconnected production regions and complicated optimal produce-up-to l...
