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作者：WAN, Y; WOLFF, RW
作者单位：University of California System; University of California Berkeley
摘要：We bound the difference in performance measures among different orders of tandem queues when service times are nonoverlapping. Two types of nonoverlapping service times, with respect to (w.r.t.) tasks and w.r.t. customers, are defined; it is not required that service times be independent. For nonoverlapping service times w.r.t. tasks, we bound the sample-path difference in number of customers in system by one, and bound the corresponding time-average difference by the traffic intensity of the ...
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作者：TAYUR, SR
摘要：Kanban-controlled serial manufacturing systems have been popular in Japan for many years. The analytical intractibility of such systems makes simulation and heuristics essential in studying them. In this paper we develop some theoretical results-reversibility and dominance-that characterize the dynamics of these systems, provide insight into their behavior and help greatly reduce the simulation effort needed to study them. These structural results also provide the basis for developing heuristi...
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作者：GRAY, AE; SEIDMANN, A; STECKE, KE
作者单位：University of Rochester; University of Michigan System; University of Michigan
摘要：The evidence is clear that a lack of attention to structured tool management has resulted in the poor performance of many manufacturing systems. Plant tooling systems affect product design options, machine loading, job batching, capacity scheduling, and real-time part routing decisions. With increasing automation in manufacturing systems, there is a growing need to integrate tool management more thoroughly into system design, planning and control. This paper critically evaluates various tool m...
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作者：MOSKOWITZ, H; PLANTE, R; TSAI, HT
作者单位：National Sun Yat Sen University
摘要：Hypertension is one of the most important risk factors with respect to coronary heart disease and stroke. The benefits of early detection of hypertension and the subsequent design of follow-up treatment programs are well documented. Consequently, screening programs have been designed to identify subjects as normotensive (normal) or hypertensive (abnormal). In order for these programs to be effective, full participation of the subject population is required. However, such classification program...
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作者：BAYUS, BL
摘要：High-Definition Television promises to be the next generation of television. This technology has broad implications for consumer markets, as well as the underlying manufacturing, technology development, and R&D activities of firms. Under increasing pressure from various groups, the U.S. government must make major policy and funding decisions based on its assessment of the likely demand for HDTV. Three published reports which forecast sales of HDTV after its scheduled introduction in the mid-19...
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作者：DUNCAN, G; GORR, W; SZCZYPULA, J
摘要：One important implementation of Bayesian forecasting is the Multi-State Kalman Filter (MSKF) method. It is particularly suited for short and irregular time series data. In certain applications, time series data are available on numerous parallel observational units which, while not having cause-and-effect relationships between them, are subject to the same external forces (e.g., business cycles). Treating them separately may lose useful information for forecasting. For such situations, involvi...
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作者：KAO, EPC; SMITH, MS
摘要：In a paper published in this journal, Mamer (1987) studies the expected costs to producers and benefits to consumers of three types of product warranty: the ordinary free replacement warranty, the unlimited free replacement warranty, and the pro-rata warranty. In addition to assuming a random product lifetime, Mamer's models allow for randomness in consumer repurchase behavior and for the possibility of an independent damage process acting on products sold under warranty. The criteria for eval...
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作者：LEE, CY; CHENG, TCE; LIN, BMT
作者单位：Hong Kong Polytechnic University; National Yang Ming Chiao Tung University
摘要：This paper considers minimizing the makespan in the 3-machine assembly-type flowshop scheduling problem. After problem formulation, we present a proof to show that the general version of this problem is strongly NP-complete. We then discuss a few polynomially solvable cases of the problem and present the solution algorithms. Next, a branch and bound solution scheme is suggested. Finally, three heuristics to find approximate solutions to the general problem are proposed and their error bounds a...
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作者：DAVIS, R; THOMAS, LG
作者单位：Emory University
摘要：This study examines the linkages between relatedness and synergy in the context of diversification among U.S. pharmaceutical firms for the period 1960-1980. Rather than assume (as in the entropy, Herfindahl and concentric indices of diversification) that the levels of synergy generated by different related combinations of business units are identical, we estimate synergy directly using a modified version of the concentric index. In addition to estimating synergy using capital market performanc...
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作者：STEINER, G; YEOMANS, S
摘要：A mixed-model manufacturing facility running under a Just-in-Time (JIT) production system is controlled by setting the production sequence of the final assembly process. This sequence is set to achieve the primary goal of an organization operating under a JIT system, which is to maintain a constant rate of part usage. In this paper, a graph-theoretic approach is used to determine an optimal solution for this goal for a new, nonconvex objective function. Furthermore, it is shown that a schedule...
