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作者：Elwany, Alaa H.; Gebraeel, Nagi Z.; Maillart, Lisa M.
作者单位：Eindhoven University of Technology; University System of Georgia; Georgia Institute of Technology; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh
摘要：Failure of many engineering systems usually results from a gradual and irreversible accumulation of damage, a degradation process. Most degradation processes can be monitored using sensor technology. The resulting degradation signals are usually correlated with the degradation process. A system is considered to have failed once its degradation signal reaches a prespecified failure threshold. This paper considers a replacement problem for components whose degradation process can be monitored us...
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作者：Pei, Pamela Pen-Erh; Simchi-Levi, David; Tunca, Tunay I.
作者单位：United Biosource Corporation; Massachusetts Institute of Technology (MIT); Stanford University
摘要：We analyze the structure and pricing of option contracts for an industrial good in the presence of spot trading. We combine the analysis of spot trading and buyers' disparate private valuations for different suppliers' products, and we jointly endogenize the determination of three major dimensions in contract design: (i) sales contracts versus options contracts, (ii) flat-price versus volume-dependent contracts, and (iii) volume discounts versus volume premia. We build a model in which a suppl...
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作者：Janssen, A. J. E. M.; van Leeuwaarden, J. S. H.; Zwart, Bert
作者单位：Eindhoven University of Technology; University System of Georgia; Georgia Institute of Technology
摘要：We apply a new corrected diffusion approximation for the Erlang C formula to determine staffing levels in cost minimization and constraint satisfaction problems. These problems are motivated by large customer contact centers that are modeled as an M/M/s queue with s the number of servers or agents. The proposed staffing levels are refinements of the celebrated square-root safety-staffing rule and have the appealing property that they are as simple as the conventional square-root safety-staffin...
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作者：Verloop, I. M.; Ayesta, U.; Nunez-Queija, R.
作者单位：Basque Center for Applied Mathematics (BCAM); Centrum Wiskunde & Informatica (CWI); Basque Foundation for Science; University of Amsterdam
摘要：We analyze a generalization of the discriminatory processor-sharing (DPS) queue in a heavy-traffic setting. Customers present in the system are served simultaneously at rates controlled by a vector of weights. We assume that customers have phase-type distributed service requirements and allow that customers have different weights in various phases of their service. In our main result we establish a state-space collapse for the queue-length vector in heavy traffic. The result shows that in the ...
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作者：Zhou, Sean X.; Yu, Yikun
作者单位：Chinese University of Hong Kong
摘要：Acquisition of used products ( cores) is central to the success of remanufacturing programs for companies. At the same time, dynamic pricing strategies have been adopted in various industries to better balance supply and customer demand. In this paper, we study the integration of these two aspects of operations together with inventory management for a production/remanufacturing firm. We develop a periodic-review single-product inventory system with price-dependent customer demand. The product ...
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作者：Simchi-Levi, David
作者单位：Massachusetts Institute of Technology (MIT)
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作者：Broadie, Mark; Cicek, Deniz; Zeevi, Assaf
作者单位：Columbia University
摘要：We consider the Kiefer-Wolfowitz (KW) stochastic approximation algorithm and derive general upper bounds on its mean-squared error. The bounds are established using an elementary induction argument and phrased directly in the terms of tuning sequences of the algorithm. From this we deduce the nonnecessity of one of the main assumptions imposed on the tuning sequences by Kiefer and Wolfowitz [Kiefer, J., J. Wolfowitz. 1952. Stochastic estimation of the maximum of a regression function. Ann. Mat...
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作者：Kuo, Chia-Wei; Ahn, Hyun-Soo; Aydin, Goeker
作者单位：National Taiwan University; University of Michigan System; University of Michigan; Indiana University System; IU Kelley School of Business; Indiana University Bloomington
摘要：Although take-it-or-leave-it pricing is the main mode of operation for many retailers, a number of retailers discreetly allow price negotiation when some haggle-prone customers ask for a bargain. At these retailers, the posted price, which itself is subject to dynamic adjustments in response to the pace of sales during the selling season, serves two important roles: (i) it is the take-it-or-leave-it price to many customers who do not bargain, and (ii) it is the price from which haggle-prone cu...
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作者：Abbas, Ali E.; Bell, David E.
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; Harvard University
摘要：Assessment of multiattribute utility functions is significantly simplified if it is possible to decompose the function into more manageable pieces. Utility independence is a powerful property that serves well for this purpose, but if it is not appropriate in a given situation, what options does the analyst have? We review some possibilities and propose a new independence assumption based on the one-switch property. We argue that it is a natural generalization of utility independence and show h...
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作者：Matoglu, Melda Ormeci; Vande Vate, John
作者单位：Ozyegin University; University System of Georgia; Georgia Institute of Technology
摘要：We model the problem of managing capacity in a build-to-order environment as a Brownian drift control problem and seek a policy that minimizes the long-term average cost. We assume the controller can, at some cost, shift the processing rate among a finite set of alternatives, for example by adding or removing staff, increasing or reducing the number of shifts, or opening or closing production lines. The controller incurs a cost for capacity per unit time and a delay cost that reflects the oppo...
