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1991 Winter Simulation Conference Proceedings.

8-11 Dec. 1991

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Displaying Results 1 - 25 of 161
  • 1991 Winter Simulation Conference Proceedings (Cat. No.91CH3050-2)

    Publication Year: 1991
    Request permission for commercial reuse | PDF file iconPDF (21 KB)
    Freely Available from IEEE
  • Gradient estimation for ratios

    Publication Year: 1991, Page(s):986 - 993
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (462 KB)

    The authors consider the interplay between gradient estimation and ratio estimation. Given unbiased estimators for the numerator and the denominator of the ratio, as well as their gradients, joint central-limit theorems for the ratio and its gradient are derived. The resulting confidence regions are of potential interest when optimizing such ratios numerically, or for sensitivity analysis with res... View full abstract»

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  • Computer simulation: an important tool in the fast-food industry

    Publication Year: 1991, Page(s):811 - 815
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The author discusses the role of computer simulation at Pizza Hut, and describes the characteristics of the simulation models. It is noted that through the use of simulation production and service aspects of Pizza Hut restaurant and delivery unit operations can be examined relative to staffing levels, equipment layout, workflow, customer service, and capacity. This permits optimization of methods ... View full abstract»

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  • Performance evaluation of ATM architectures in multimedia traffic environments

    Publication Year: 1991, Page(s):695 - 704
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    A simulation model for the performance evaluation of fast packet switching architectures under multimedia traffic conditions is presented. The simulator is based on an integration of the SLAM-II tool with special-purpose C routines that model the internal structure and operational details of the basic switching fabrics. Two types of traffic sources, namely, Bernoulli sources and correlated sources... View full abstract»

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  • Simulation of Fox River locks boat lift

    Publication Year: 1991, Page(s):802 - 808
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The SLAM computer simulation model of the locks system on the lower Fox River was modified to represent the operation of a proposed boat lift at the Rapide Croche lock. This boat lift is needed due to construction of a barrier to prevent migration of sea lamprey into the Fox River and Wolf River basins. The barrier gas put in place prior to the 1988 navigation season by sealing the Rapide Croche l... View full abstract»

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  • Material handling in a flexible manufacturing system processing part families

    Publication Year: 1991, Page(s):375 - 381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The system performance of a six-machine flexible manufacturing system cell in which a material handling system is to be incorporated is analyzed. The analysis focuses on determining the production potential of the cell by grouping common parts into families. To accomplish this, computer simulation models are developed using the SIMAN simulation language. Initially the manufacturing cell is modeled... View full abstract»

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  • Simulation with SIMNET II

    Publication Year: 1991, Page(s):132 - 135
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    An outline of the SIMNET II simulation language is presented. SIMNET II is a network-based discrete simulation language that utilizes only four nodes: a source, a queue, a facility, and an auxiliary. Routing of transactions among the four nodes is effected by executing special assignments along the branches linking the nodes. SIMNET II offers powerful computational capabilities at a level equal to... View full abstract»

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  • A teletraffic simulator for circuit switched and signaling intelligent network with SS7

    Publication Year: 1991, Page(s):688 - 694
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A CSIM-based teletraffic simulator originally designed for a circuit switched network was expanded to simulate SS7 (Signaling System Number 7) and intelligent networks. The authors describe the design paradigm of the simulator and how it achieves the performance measurement of and planning for hybrid networks. The modeling techniques for the circuit switched network, the signaling network, and the... View full abstract»

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  • Optimization test problems with uniformly distributed coefficients

    Publication Year: 1991, Page(s):866 - 874
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    When an empirical evaluation of a solution method for an optimization problem is conducted, a standard approach is to generate test problems in which all of the coefficients are assumed to be independently and uniformly distributed. However, the performance of algorithms and heuristics can degrade as the correlation among the coefficients in integer programming test problems is strengthened. The a... View full abstract»

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  • GPSS World: A brief preview

    Publication Year: 1991, Page(s):59 - 61
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    GPSS (general purpose simulation system) World is a complete redesign and reimplementation of the popular GPSS/PC simulation environment. The limitations of the old PC DOS environment and the emerging trends in desktop computing have combined to motivate drastic changes which are planned for the new environment to be made available, beginning in 1992. The inclusion of windowing, virtual memory, an... View full abstract»

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  • A rapid railway simulation model development system incorporating automatic model generation

    Publication Year: 1991, Page(s):792 - 801
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    The authors discuss the development of a railway simulation system incorporating automatic model specification and automatic model generation techniques. The modeling environment features a GEM-like graphical user interface consisting of a layout editor and an icon editor. The model builder draws only the geometrical layout of a railway network section (e.g., a railway terminal) including the posi... View full abstract»

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  • Error detection and display for graphical modeling environments

    Publication Year: 1991, Page(s):1139 - 1145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The authors discuss the error detection and display capabilities they believe are needed in visual modeling tools and describe the implementation of these capabilities in the Research Queueing Package Modeling Environment (RESQME). They describe how the interface can incrementally (i.e., while the model is being constructed) eliminate some classes of errors and detect and assist in correcting the ... View full abstract»

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  • On improving pseudo-random number generators

    Publication Year: 1991, Page(s):1035 - 1042
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The authors provide some theoretical justifications for the asymptotic uniformity and asymptotic independence of the combination generators without the usual assumption of independence of the generators. The theorems presented give a general method of transforming a possibly bad generator into a much better generator which will yield an asymptotically independent and uniformly distributed random s... View full abstract»

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  • Design and analysis of computer-aided cart systems for picking discrete items

    Publication Year: 1991, Page(s):365 - 374
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The author examines operational instructions and design policies for implementing computer-aided cart systems from the standpoint of efficiency. From results of analysis it is found that operators should follow their basic routing efficiently retrieve items. In designing the cart systems it is better to make an intermediate shortcut from the efficiency standpoint. In addition, optimization analysi... View full abstract»

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  • Tutorial: Scheduling manufacturing systems with FACTOR

    Publication Year: 1991, Page(s):128 - 131
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The basic concepts of FACTOR version 5.0 as applied to scheduling a production facility are presented. The topics discussed include the FACTOR 5.0 modeling constructs, integration with existing production data, and the use of FACTOR for schedule creation and adjustment View full abstract»

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  • A systems simulation approach to integrate maintenance operations

    Publication Year: 1991, Page(s):677 - 687
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    The authors describe a systems simulation study to investigate new work load assignment techniques and explore the potential for integrating related maintenance operations. The concept of a universal technician is introduced to facilitate the integration of tasks of differing complexities. The maintenance operations are modeled as an acyclic network of G|G|M-FCFS (first-come first-served) queues w... View full abstract»

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  • A method for randomly generating capacitated networks

    Publication Year: 1991, Page(s):861 - 865
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    A description is given of an approach for randomly generating capacitated (s,t)-networks of 10 nodes or more. A generator program written in BASIC demonstrates the approach. The results of run time experiments conducted with the generator for various network sizes are also presented. The generator, which can produce large networks very quickly, is designed for use with capacitated network optimiza... View full abstract»

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  • Towards a logical foundation of discrete event modeling and simulation

    Publication Year: 1991, Page(s):1083 - 1085
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The author presents the first step in developing a logical foundation of discrete event modeling and simulation (DEMS) by defining some of the fundamental terms and concepts of DEMS from a logical viewpoint. The fundamental notions of events and states are defined in terms of two types of propositions (instantaneous and static). The notion of the behavior of a system/model over a time interval is ... View full abstract»

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  • Avoiding the problems and pitfalls in simulation

    Publication Year: 1991, Page(s):48 - 55
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    An approach is given for conducting a simulation project that will aid in avoiding many common problems and pitfalls. The author provides recommendations on how to scope the project, develop a functional specification, formulate and construct the model, verify and validate, collect data, document the work, and perform the required analysis. The intent is to provide the novice simulation modeler wi... View full abstract»

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  • Introduction to SIMAN IV

    Publication Year: 1991, Page(s):106 - 111
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The SIMAN IV environment integrates model building, running, animation, and data analysis. The authors discuss the SIMAN IV simulation environment and the concepts and methods for simulating manufacturing systems using the SIMAN IV simulation language View full abstract»

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  • Measuring the user acceptance of generic manufacturing simulation models by review of modeling assumptions

    Publication Year: 1991, Page(s):419 - 427
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A measure of user acceptance for generic discrete manufacturing models is introduced. This measure is based on review of modeling assumptions and computed as the percentage of assumptions that are acceptable to the user. The assumptions, which describe the modeling options that are available in generic models, give the user a detailed account of the capabilities and limitations of the generic mode... View full abstract»

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  • Application of an integrated modeling tool: United Parcel Service

    Publication Year: 1991, Page(s):786 - 791
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A case study on the application of an integrated tool on a package shipping facility of the United Parcel Service (UPS) is presented. This tool uses an integrated set of five software packages: LOTUS, MANUPLAN, SIMSTARTER, SIMAN, and CINEMA. These packages work as an integrated tool which takes a design idea from a rough cut stochastic analysis to a highly accurate real-world simulation. The tool ... View full abstract»

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  • Abstraction morphisms for world modelling in high autonomy systems

    Publication Year: 1991, Page(s):1129 - 1138
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A model-based autonomous system uses a multiplicity of models at various control layers to support the predefined system objectives. These models differ in level of abstraction and in formalism. It is noted that concepts and tools are needed to organize the models into a coherent whole. The authors have developed abstraction mechanisms for mapping models of laboratory instruments into operational ... View full abstract»

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  • The cost of terminating synchronous parallel discrete-event simulations

    Publication Year: 1991, Page(s):642 - 651
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    The authors propose seven algorithms by which an arbitrary termination condition can be mechanically added to a nonterminating parallel simulation using a conservative-synchronous protocol. Informal arguments about the performance of each algorithm are made, and the arguments are confirmed through measurement of the bounded lag protocol using torus networks on a shared memory multiprocessor. Conse... View full abstract»

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  • Neave effect also occurs with Tausworthe sequences

    Publication Year: 1991, Page(s):1030 - 1034
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    It is shown that the use of Box-Muller method with Tausworthe sequences for generating normal deviates can produce pathological phenomena similar to the Neave effect, which was found to occur when linear congruential sequences and the Box-Muller method are combined. Two examples of the phenomena are given for Tausworthe sequences in practical use. One of the examples demonstrates that such phenome... View full abstract»

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