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作者：Kornish, Laura J.; Keeney, Ralph L.
作者单位：University of Colorado System; University of Colorado Boulder; Duke University
摘要：Seasonal products have an effective inventory deadline, a time by which the inventory must be ready to distribute. The deadline creates an incentive to start early with production. However, opportunities to gather information that might change production decisions provide an incentive to defer the start of production. We study the resultant dynamic decision problem with alternatives that commit to one of several courses of action now and an alternative to defer the commitment to gather more in...
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作者：Constantino, Miguel; Martins, Isabel; Borges, Jose G.
作者单位：Universidade de Lisboa; Universidade de Lisboa; Universidade de Lisboa; Centro de Estudos Florestais
摘要：Forest ecosystem management often requires spatially explicit planning because the spatial arrangement of harvests has become a critical economic and environmental concern. Recent research on exact methods has addressed both the design and the solution of forest management problems with constraints on the clearcut size, but where simultaneously harvesting two adjacent stands in the same period does not necessarily exceed the maximum opening size. Two main integer programming approaches have be...
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作者：Campos-Nanez, Enrique; Garcia, Alfredo; Li, Chenyang
作者单位：George Washington University; University of Virginia
摘要：Wireless sensor networks pose numerous fundamental coordination problems. For example, in a number of application domains including homeland security, environmental monitoring, and surveillance for military operations, a network's ability to efficiently manage power consumption is extremely critical because direct user intervention after initial deployment is severely limited. In these settings, limited battery life gives rise to the basic coordination problem of maintaining coverage while max...
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作者：Bernstein, Fernando; de Vericourt, Francis
作者单位：Duke University; European School of Management & Technology
摘要：We consider a market with two suppliers and a set of buyers in search of procurement contracts with one of the suppliers. In particular, each buyer needs to process a certain volume of work, and each supplier's ability to process the customers' requests is constrained by a production capacity. The procurement contracts include guarantees that the products will be available when needed, and the buyers select a supplier based on their service delivery offers. The suppliers are modeled as make-to...
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作者：Gupta, Diwakar; Wang, Lei
作者单位：University of Minnesota System; University of Minnesota Twin Cities
摘要：In addition to having uncertain patient arrivals, primary-care clinics also face uncertainty arising from patient choices. Patients have different perceptions of the acuity of their need, different time-of-day preferences, as well as different degrees of loyalty toward their designated primary-care provider (PCP). Advanced access systems are designed to reduce wait and increase satisfaction by allowing patients to choose either a same-day or a scheduled future appointment. However, the clinic ...
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作者：Bassamboo, Achal; Juneja, Sandeep; Zeevi, Assaf
作者单位：Northwestern University; Tata Institute of Fundamental Research (TIFR); Columbia University
摘要：We consider the risk of a portfolio comprising loans, bonds, and financial instruments that are subject to possible default. In particular, we are interested in performance measures such as the probability that the portfolio incurs large losses over a fixed time horizon, and the expected excess loss given that large losses are incurred during this horizon. Contrary to the normal copula that is commonly used in practice (e. g., in the CreditMetrics system), we assume a portfolio dependence stru...
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作者：Giles, Michael B.
作者单位：University of Oxford; University of Oxford
摘要：We show that multigrid ideas can be used to reduce the computational complexity of estimating an expected value arising from a stochastic differential equation using Monte Carlo path simulations. In the simplest case of a Lipschitz payoff and a Euler discretisation, the computational cost to achieve an accuracy of O(epsilon) is reduced from O(epsilon(-3)) to O(epsilon(-2)(log epsilon)(2)). The analysis is supported by numerical results showing significant computational savings.
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作者：Ormeci, Melda; Dai, J. G.; Vate, John Vande
作者单位：University System of Georgia; Georgia Institute of Technology
摘要：When a manufacturer places repeated orders with a supplier to meet changing production requirements, he faces the challenge of finding the right balance between holding costs and the operational costs involved in adjusting the shipment sizes. We consider an inventory whose content fluctuates as a Brownian motion in the absence of control. At any moment, a controller can adjust the inventory level by any positive or negative quantity, but incurs both a fixed cost and a cost proportional to the ...
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作者：Hopp, Wallace J.; Xu, Xiaowei
作者单位：University of Michigan System; University of Michigan; Rutgers University System; Rutgers University New Brunswick; Rutgers University Newark
摘要：We propose a static approximation of dynamic demand substitution behavior based on a fluid network model and a service-inventory mapping. This approximation greatly enhances our ability to analyze the interdependent inventory/service, price, and product assortment decisions in noncompetitive and competitive scenarios with demand substitution. We demonstrate that the approximation is well behaved and then apply it to two previously intractable applications. First, we study a price and service c...
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作者：Kunnumkal, Sumit; Topaloglu, Huseyin
作者单位：Indian School of Business (ISB); Cornell University
摘要：In this paper, we consider numerous inventory control problems for which the base-stock policies are known to be optimal, and we propose stochastic approximation methods to compute the optimal base-stock levels. The existing stochastic approximation methods in the literature guarantee that their iterates converge, but not necessarily to the optimal base-stock levels. In contrast, we prove that the iterates of our methods converge to the optimal base-stock levels. Moreover, our methods continue...
