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作者：Naphade, KS; Wu, SD; Storer, RH; Doshi, BJ
作者单位：Lehigh University
摘要：The ingot formation or melt process is the first step in many steel-making operations. This process involves melting steel and alloys in the desired chemical composition, then pouring it into a variety of ingot molds. Complex technological and resource constraints can make the planning and scheduling of such processes extremely challenging. In this paper, we report our experience in developing solution methods for this melt scheduling problem at BethForge, a division of the Bethlehem Steel Cor...
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作者：Mahajan, S; van Ryzin, G
作者单位：Duke University; Columbia University
摘要：We analyze a model of inventory competition among n firms that provide competing, substitutable goods, Each firm chooses initial inventory levels for their good in a single period (newsboy-like) inventory model. Customers choose dynamically based on current availability, so the inventory levels at one firm affect the demand of all competing firms. This creates a strategic interaction among the firms' inventory decisions. Our work extends earlier work on variations of this problem by Karjalaine...
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作者：Cachon, GP
作者单位：University of Pennsylvania
摘要：This paper studies the competitive and cooperative selection of inventory policies in a two-echelon supply chain with one supplier and N retailers. Stochastic demand is monitored continuously. Retailers incur inventory holding and backorder penalty costs. The supplier incurs holding costs for its inventory and backorder penalty costs for backorders at the retailers. The latter cost reflects the supplier's desire to maintain adequate availability of its product to consumers. Previous research f...
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作者：Kenyon, C; Tompaidis, S
作者单位：International Business Machines (IBM); IBM Switzerland; University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin
摘要：We study options on short-term leases for capital-intensive equipment performing specific functions and services, such as leases for semi-submersible drilling rigs, marine seismic services, corporate real estate leasing, retail space leasing, and apartment leasing. We quantify the effect of an important factor in pricing options on these services: idle time between consecutive lease contracts. We show that while the expected, discounted value for a contract with options is unique, option price...
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作者：Kamrad, B; Ernst, R
作者单位：Georgetown University
摘要：This paper develops an operational risk management model for I evaluating production efforts in manufacturing and mining industries where the resource to be exploited is nonhomogenous. Using a contingent claims methodology now commonly encountered in financial applications, we formulate a production control model in an environment characterized by market and process uncertainty, In our analysis, market risk is depicted by the output price while process uncertainty is captured by the random var...
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作者：Wasserman, KM; Olsen, TL
作者单位：University of Michigan System; University of Michigan; Washington University (WUSTL)
摘要：This paper considers a continuous-time non-Markovian parallel queueing system subject to external disturbances. The servers are mutually interfering in that their service rates are nonlinearly interdependent functions of the controls applied by the servers, and external discrete-valued continuous-time random disturbances. At certain time epochs, namely, every A time units, the servers may adjust their service rates by Chancing the values of their controls; however, the system may change its st...
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作者：Bartholdi, JJ; Eisenstein, DD; Foley, RD
作者单位：University System of Georgia; Georgia Institute of Technology; University of Chicago
摘要：Bucket brigades are a way of sharing work on a flow line that results in the spontaneous emergence of balance and consequent high throughput. All this happens without a work-content model or traditional assembly line balancing technology. Here we show that bucket brigades can be effective even in the presence of variability in the work content. In addition, we report confirmation at the national distribution center of a major chain retailer, which experienced a 34% increase in productivity aft...
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作者：George, JM; Harrison, JM
作者单位：Stanford University
摘要：We consider a single-server queue with Poisson arrivals, where holding costs are continuously incurred as a nondecreasing function of the queue length. The queue length evolves as a birth-and-death process with constant arrival rate lambda = 1 and with state-dependent service rates mu (n) that can be chosen from a fixed subset A of [0, infinity). Finally, there is a nondecreasing cost-of-effort function c(.) on A, and service costs are incurred at rate c(g.) when the queue length is n. The obj...
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作者：Chick, SE; Inoue, K
作者单位：University of Michigan System; University of Michigan
摘要：Standard indifference-zone procedures that allocate computer resources to infer the best of a finite set of simulated systems are designed with a statistically conservative, least favorable configuration assumption consider the probability of correct selection (but not the opportunity cost) and assume that the cost of simulating each system is the same. Recent Bayesian work considers opportunity cost and shows that an average case analysis may be less conservative but assumes a known output va...
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作者：Chick, SE
作者单位：University of Michigan System; University of Michigan
摘要：A number of authors have identified problematic issues with techniques used in current simulation practice for selecting probability distributions and their parameters for input to stochastic simulations. A major goal of this paper is to address some of those issues by presenting a self-consistent evaluation of the uncertainty about the mean value of the simulation output, when there is uncertainty in both the parameters and functional form of input distributions (structural uncertainty), and ...
