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作者：Alexopoulos, Christos; Goldsman, David; Mokashi, Anup C.; Tien, Kal-Wen; Wilson, James R.
作者单位：University System of Georgia; Georgia Institute of Technology; SAS Institute Inc; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; North Carolina State University
摘要：Sequest is an automated sequential simulation-analysis procedure designed to provide improved point and confidence-interval (CI) estimators for a designated steady-state quantile by the use of batching and sectioning. The procedure incorporates techniques to do the following: (i) reduce the absolute bias of the sectioning-based point estimator caused by atypical simulation initialization or an inadequate sample size, (ii) adjust the batching-based CI half-length to compensate for correlation o...
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作者：Fattahi, Ali; Dasu, Sriram; Ahmadi, Reza
作者单位：University of California System; University of California Los Angeles; University of Southern California
摘要：The nonnegative least-squares (NNLS) problem is defined as finding the Euclidean distance to a convex cone generated by a set of discrete points in R. In this paper, we study NNLS when the discrete points are implicitly known and there are an exponentially large number of them (e.g., the set of integer feasible solutions of a mixed-integer program). This problem is motivated by a large auto manufacturer that produces mass customized products where the products are configured by choosing a subs...
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作者：Kerstens, Kristiaan; Sadeghi, Jafar; Van de Woestyne, Ignace
作者单位：IESEG School of Management; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute for Humanities & Social Sciences (INSHS); Kharazmi University; KU Leuven
摘要：The output-oriented plant capacity notion, which has been around for more than two decades, has been empirically applied mainly in the fishery and the hospital sectors. Since its introduction to the literature, a specified problem is that this notion may not be attainable, in that it presupposes potentially unlimited numbers of variable inputs to determine the maximum number of outputs available. However, this lack of attainability has not been explored previously. This paper fills this void b...
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作者：Afeche, Philipp; Baron, Opher; Milner, Joseph; Roet-Green, Ricky
作者单位：University of Toronto; University of Rochester
摘要：We consider the pricing/lead-time menu design problem for a monopoly service in which time-sensitive customers have demand on multiple occasions. Customers differ in their demand rates and marginal values (per use). We assume that customers queue for a finite-capacity service under a general pricing structure. Customers choose a plan from the menu to maximize their expected utility. We compare two models: one in which the demand rate is the private information of the customers, and another in ...
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作者：Zhao, Long; Chakrabarti, Deepayan; Muthuraman, Kumar
作者单位：University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin
摘要：We address the problem of poor portfolio performance when a minimum-variance portfolio is constructed using the sample estimates. Estimation errors are mostly blamed for the poor portfolio performance. However, we argue that even small unbiased estimation errors can lead to significantly bad performance because the optimization step amplifies errors, in a nonsymmetric way. Instead of trying to independently improve the estimation step or fix the optimization step for robustness, we disentangle...
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作者：Feng, Youyi; Xu, Jianjun; Zheng, Shaohui
作者单位：Sichuan University; Dongbei University of Finance & Economics; Dongbei University of Finance & Economics; Hong Kong University of Science & Technology
摘要：We consider a periodic-review inventory system of two products with positive replenishment lead times, assuming that downward substitution is allowed and that replenishment is capped. We aim to characterize the structures of the optimal policies for product replenishment and substitution that minimize the expected total discounted cost over a finite horizon. With a Markovian decision programming formulation and an appropriate relaxation of constraints on the substitution quantity, we show that...
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作者：Aswani, Anil; Shen, Zuo-Jun Max; Siddiq, Auyon
作者单位：University of California System; University of California Berkeley; University of California System; University of California Berkeley; University of California System; University of California Berkeley; University of California System; University of California Los Angeles
摘要：The Medicare Shared Savings Program (MSSP) was created under the Patient Protection and Affordable Care Act to control escalating Medicare spending by incentivizing providers to deliver healthcare more efficiently. Medicare providers that enroll in the MSSP earn bonus payments for reducing spending to below a risk-adjusted financial benchmark that depends on the provider's historical spending. To generate savings, a provider must invest to improve efficiency, which is a cost that is absorbed e...
