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作者：MARTIN, JL; HARRISON, TP
摘要：Many firms with self-funded medical insurance administered by outside parties fail to review the administrators' performance effectively. Often the firms do not know the extent of overpayments because they lack the ''pert knowledge to evaluate the paid claims. We examine the use of a simple ''pert system in conjunction with optimization methods for identifying claims payment errors. The knowledge base is constructed using expertise from the areas of claims processing, auditing, medical diagnos...
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作者：LEE, HL; BILLINGTON, C
作者单位：Hewlett-Packard
摘要：A supply chain is a network of facilities that performs the functions of procurement of material, transformation of material to intermediate and finished products, and distribution of finished products to customers. Often, organizational barriers between these facilities exist, and information flows can be restricted such that complete centralized control of material flows in a supply chain may not be feasible or desirable. Consequently, most companies use decentralized control in managing the...
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作者：CAULKINS, JP
摘要：This paper introduces a model that describes how local drug markets might respond to intensive local enforcement operations known as crackdowns. The model supports the intuition of some drug policy analysts and makes concrete suggestions for how crackdowns should be managed.
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作者：MOSKOWITZ, H; PRECKEL, PV; YANG, AN
摘要：An approach to the solution of decision analysis problems under uncertainty with imprecise and incomplete information is presented. The methodology is designed for cases in which payoffs (conditional on the state of nature) are known precisely, but only limited or imprecise probability and utility information is available regarding a decision maker's beliefs and tastes. A decision maker provides: conditional payoffs, (optionally) bounds on state probabilities, bounds on the certainty equivalen...
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作者：DONOHUE, JM; HOUCK, EC; MYERS, RH
作者单位：Virginia Polytechnic Institute & State University
摘要：Construction of simulation designs for the estimation of response surface metamodels is often based on optimal design theory. Underlying such designs is the assumption that the postulated model provides the correct representation of the simulated response. As a result, the location of design points and the assignment of pseudorandom number streams to these experiments are determined through the minimization of some function of the covariance matrix of the model coefficient estimators. In contr...
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作者：BITRAN, GR; DASU, S
作者单位：University of California System; University of California Los Angeles
摘要：We study a class of point processes generated by transitions in Markov chains. We are primarily concerned with approximating superposed phase renewal processes by these point processes. We identify a subclass of Markov chains that we call Super-Erlang chains. These chains have special properties that facilitate the development of approximations. We outline an approximation procedure and provide computational results that demonstrate the potential of the approach. The primary motivation for thi...
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作者：HAMADA, T; GLAZEBROOK, KD
作者单位：Newcastle University - UK
摘要：In this paper, we consider a scheduling problem in which m classes, J1, J2, ..., J(m), of independent jobs with ready time 0 are to be processed by a single machine. The number of jobs of class J(i) is n(i) and the processing times of these n(i) jobs are independent and identically distributed exponentially distributed with unknown parameter theta(i), which has a conjugate gamma prior. The objective is to minimize the expected (weighted) sum of flowtimes of all the jobs, where R(i) is the weig...
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作者：THOMPSON, PM; PSARAFTIS, HN
作者单位：National Technical University of Athens
摘要：This paper investigates the application of a new class of neighborhood search algorithms-cyclic transfers-to multivehicle routing and scheduling problems. These algorithms exploit the two-faceted decision structure inherent to this problem class: First, assigning demands to vehicles and, second, routing each vehicle through its assigned demand stops. We describe the application of cyclic transfers to vehicle routing and scheduling problems. Then we determine the worst-case performance of these...
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作者：BOWMAN, RA; MUCKSTADT, JA
作者单位：Cornell University
摘要：A cyclic schedule is a sequence of tasks on a set of machines that is repeated indefinitely. We model cyclic schedules as Markov chains and use ergodic theory to analyze and improve the performance of cyclic schedules in environments with machine breakdowns, yield losses, and other sources of variability. The concept of cyclic task criticality is developed as a natural extension of task criticalities in PERT networks. We show that cyclic task criticalities can and should be used to guide the m...
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作者：KLEIN, RS; LUSS, H; ROTHBLUM, UG
作者单位：Technion Israel Institute of Technology
摘要：Resource allocation problems focus on the allocation of limited resources among competing activities. We examine such problems when certain substitutions among resources are possible. The substitutional relations can be represented by a graph comprised of multiple components. In each component, the nodes correspond to resources and the ares correspond to feasible substitutions. The objective is of the minimax form, where each term is a continuous, strictly decreasing function of a single activ...
