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作者：Hafizoglu, A. Baykal; Gel, Esma S.; Keskinocak, Pinar
作者单位：Arizona State University; Arizona State University-Tempe; University System of Georgia; Georgia Institute of Technology
摘要：We study price and lead time quotation decisions in a make-to-order system with two customer classes: (1) contract customers whose orders are practically always accepted and fulfilled based on a contract price and lead time agreed on at the beginning of the time horizon, and (2) spot purchasers who arrive over time and are quoted a price and lead time pair dynamically. The objective is to maximize the long-run expected average profit per unit time, where profit from a customer is defined as re...
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作者：Zhang, Huanan; Shi, Cong; Chao, Xiuli
作者单位：University of Michigan System; University of Michigan
摘要：We develop the first approximation algorithm for periodic-review perishable inventory systems with setup costs. The ordering lead time is zero. The model allows for correlated demand processes that generalize the well-known approaches to model dynamic demand forecast updates. The structure of optimal policies for this fundamental class of problems is not known in the literature. Thus, finding provably near-optimal control policies has been an open challenge. We develop a randomized proportiona...
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作者：Du, Chenhao; Cooper, William L.; Wang, Zizhuo
作者单位：University of Minnesota System; University of Minnesota Twin Cities
摘要：We consider a seller's problem of determining revenue-maximizing prices for an assortment of products that exhibit network effects. Customers make purchase decisions according to a multinomial logit choice model, modified-to incorporate network effects-so that the utility each individual customer gains from purchasing a particular product depends on the market's total consumption of that product. In the setting of homogeneous products, we show that if the network effect is comparatively weak, ...
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作者：Hoogeboom, Maaike; Battarra, Maria; Erdogan, Gunes; Vigo, Daniele
作者单位：Vrije Universiteit Amsterdam; University of Bath; University of Bologna
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作者：Elmachtoub, Adam N.; Levi, Retsef
作者单位：Columbia University; Massachusetts Institute of Technology (MIT)
摘要：We consider new online variants of supply chain management models, where in addition to production decisions, one also has to actively decide on which customers to serve. Specifically, customers arrive sequentially during a selection phase, and one has to decide whether to accept or reject each customer upon arrival. If a customer is rejected, then a lost-sales cost is incurred. Once the selection decisions are all made, one has to satisfy all the accepted customers with minimum possible produ...
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作者：Ardestani-Jaafari, Amir; Delage, Erick
作者单位：Universite de Montreal; HEC Montreal
摘要：Robust optimization is a methodology that has gained a lot of attention in the recent years. This is mainly due to the simplicity of the modeling process and ease of resolution even for large scale models. Unfortunately, the second property is usually lost when the cost function that needs to be robustified is not concave (or linear) with respect to the perturbing parameters. In this paper we study robust optimization of sums of piecewise linear functions over polyhedral uncertainty set. Given...
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作者：Oreshkin, Boris N.; Regnard, Nazim; L'Ecuyer, Pierre
作者单位：Universite de Montreal
摘要：We propose, develop, and compare new stochastic models for the daily arrival rate in a call center. Following standard practice, the day is divided into time periods of equal length (e.g., 15 or 30 minutes), the arrival rate is assumed random but constant in time in each period, and the arrivals are from a Poisson process, conditional on the rate. The random rate for each period is taken as a deterministic base rate (or expected rate) multiplied by a random busyness factor having mean 1. Model...
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作者：Shapiro, Alexander
作者单位：University System of Georgia; Georgia Institute of Technology
摘要：In this paper we consider the notion of rectangularity of a set of probability measures from a somewhat different point of view. We define rectangularity as a property of dynamic decomposition of a distributionally robust stochastic optimization problem and show how it relates to the modern theory of coherent risk measures. Consequently, we discuss robust formulations of multistage stochastic optimization problems in frameworks of stochastic programming, stochastic optimal control, and Markov ...
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作者：Xie, Jing; Frazier, Peter I.; Chick, Stephen E.
作者单位：Cornell University; INSEAD Business School
摘要：This paper addresses discrete optimization via simulation. We show that allowing for both a correlated prior distribution on the means (e.g., with discrete Kriging models) and sampling correlation (e.g., with common random numbers, or CRN) can significantly improve the ability to quickly identify the best alternative. These two correlations are brought together for the first time in a highly sequential knowledge-gradient sampling algorithm, which chooses points to sample using a Bayesian value...
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作者：Papier, Felix
作者单位：ESSEC Business School
摘要：We study the problem of allocating supply under advance demand information. We consider a company that must allocate limited inventory to different markets that open sequentially. To reduce uncertainty, the company receives advance demand information and updates forecasts about its markets each time it makes an allocation decision. We study the value and optimal use of this information. This research is motivated by an agrifood manufacturer that operates in several European countries. We devel...
