-
作者：Iida, Tetsuo; Zipkin, Paul
作者单位：Komazawa University; Duke University
摘要：We consider a serial supply chain with one supplier and one retailer. Each obtains some demand forecast information, which may be shared or not. We investigate the members' benefits from sharing information. The forecasts follow a variant of the Martingale model of forecast evolution (MMFE). We construct a simple transfer-payment scheme to align the players' incentives with that of the overall system. The main finding is that, unless the players' incentives are aligned in this way, sharing inf...
-
作者：Goh, Joel; Sim, Melvyn
作者单位：National University of Singapore; National University of Singapore; National University of Singapore
摘要：In this paper we focus on a linear optimization problem with uncertainties, having expectations in the objective and in the set of constraints. We present a modular framework to obtain an approximate solution to the problem that is distributionally robust and more flexible than the standard technique of using linear rules. Our framework begins by first affinely extending the set of primitive uncertainties to generate new linear decision rules of larger dimensions and is therefore more flexible...
-
作者：Heidergott, Bernd; Farenhorst-Yuan, Taoying
作者单位：Vrije Universiteit Amsterdam; Vrije Universiteit Amsterdam; Tinbergen Institute
摘要：We consider multicomponent maintenance systems with an F-failure group age-replacement policy: it keeps failed components idling until F components are failed and then replaces all failed components together with the nonfailed components whose age has passed the critical threshold age theta(n) for components of type n. With each maintenance action, costs are associated. We derive various unbiased gradient estimators based on the measure-valued differentiation approach for the gradient of the a...
-
作者：Farias, Vivek F.; Van Roy, Benjamin
作者单位：Massachusetts Institute of Technology (MIT); Stanford University
摘要：We study a problem of dynamic pricing faced by a vendor with limited inventory, uncertain about demand, and aiming to maximize expected discounted revenue over an infinite time horizon. The vendor learns from purchase data, so his strategy must take into account the impact of price on both revenue and future observations. We focus on a model in which customers arrive according to a Poisson process of uncertain rate, each with an independent, identically distributed reservation price. Upon arri...
-
作者：Cadenillas, Abel; Lakner, Peter; Pinedo, Michael
作者单位：University of Alberta; University of Alberta; New York University
摘要：Motivated by empirical observations, we assume that the inventory level of a company follows a mean-reverting process. The objective of the management is to keep this inventory level as close as possible to a given target; there is a running cost associated with the difference between the actual inventory level and the target. If inventory deviates too much from the target, management may perform an intervention in the form of either a purchase or a sale of an amount of the goods. There are fi...
-
作者：Gemici-Ozkan, Banu; Wu, S. David; Linderoth, Jeffrey T.; Moore, Jeffry E.
作者单位：Lehigh University; University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison; Lehigh University
摘要：We introduce a decision-support framework for the research and development (R&D) portfolio selection problem faced by a major U. S. semiconductor manufacturer. R&D portfolio selection is of critical importance to high-tech operations such as semiconductors and pharmaceuticals, because it determines the blend of technological development the firm must invest in its R&D resources. This R&D investment leads to differentiating technologies that drive the firm's market position. We developed a gene...
-
作者：Cui, Tingting; Ouyang, Yanfeng; Shen, Zuo-Jun Max
作者单位：University of California System; University of California Berkeley; University of Illinois System; University of Illinois Urbana-Champaign
摘要：Reliable facility location models consider unexpected failures with site-dependent probabilities, as well as possible customer reassignment. This paper proposes a compact mixed integer program (MIP) formulation and a continuum approximation (CA) model to study the reliable uncapacitated fixed charge location problem (RUFL), which seeks to minimize initial setup costs and expected transportation costs in normal and failure scenarios. The MIP determines the optimal facility locations as well as ...
-
作者：Kwon, H. Dharma
作者单位：University of Illinois System; University of Illinois Urbana-Champaign
摘要：Even in the face of deteriorating and highly volatile demand, firms often invest in, rather than discard, aging technologies. To study this phenomenon, we model the firm's profit stream as a Brownian motion with negative drift. At each point in time, the firm can continue operations, or it can stop and exit the project. In addition, there is a one-time option to make an investment that boosts the project's profit rate. Using stochastic analysis, we show that the optimal policy always exists an...
-
作者：Taskin, Z. Caner; Smith, J. Cole; Romeijn, H. Edwin; Dempsey, James F.
作者单位：State University System of Florida; University of Florida; University of Michigan System; University of Michigan; State University System of Florida; University of Florida
摘要：We consider a problem dealing with the efficient delivery of intensity modulated radiation therapy (IMRT) to individual patients. IMRT treatment planning is usually performed in three phases. The first phase determines a set of beam angles through which radiation is delivered, followed by a second phase that determines an optimal radiation intensity profile (or fluence map). This intensity profile is selected to ensure that certain targets receive a required amount of dose while functional org...
-
作者：Caro, Felipe; Gallien, Jeremie
作者单位：University of California System; University of California Los Angeles; Massachusetts Institute of Technology (MIT)
摘要：Working in collaboration with Spain-based retailer Zara, we address the problem of distributing, over time, a limited amount of inventory across all the stores in a fast-fashion retail network. Challenges specific to that environment include very short product life cycles, and store policies whereby an article is removed from display whenever one of its key sizes stocks out. To solve this problem, we first formulate and analyze a stochastic model predicting the sales of an article in a single ...
