ISI - an environment for the engineering use of general purpose simulation languages

Article Abstract:

Present day approaches to discrete event simulation can be broadly classified as using either special purpose data-driven simulation systems or general purpose simulation languages. Although the latter embrace a far wider range of applications and offer much greater flexibility in modeling for a particular application, their user base is restricted by the high level of expertise required. An Expert System interface to general purpose simulation languages, ISI (the Intelligent Simulation Interface), is presented here. Models are constructed and simulation runs are performed in an integrated environment comprising interactive menu-driven graphics, a knowledge base system and a general purpose simulation language. The features of ISI include hierarchical model construction, interactive experiment specification, automatic code generation, run-time animation and interactive graphical post-processing of results. An example case study is presented illustrating the main aspects of ISI. The ISI interface is shown to extend a general purpose language into an intelligent simulation environment. (Reprinted by permission of the publisher.)

Expert systems, Code generators, Hierarchical Organization, Discrete Simulation, Modeling of Computer Systems, technical, Code Generator

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Process-Interaction Simulation Languages

Article Abstract:

A number of currently available simulation language are based on, or offer, the process-interaction approach to simulation; among these languages are GPSS-H, SIMAN, SIMSCRIPT 11.5 and SLAM II. This paper provides an introductory survey and description of these four languages, plus a briefer mention of a number of others. First, we give general information regarding the language, including a brief description of the language's perspective, computers on which it is implemented, the address and telephone numbers for information, a partial listing of relevant text and manuals, and presently available short courses on language instruction. Second, we explain the perspective of the four languages in greater detail, and model an example problem using each language. An overview of each solution plus a detailed statement-by-statement description is given.

Programming languages, Mainframe computers, Minicomputers, Modeling, Data modeling software, Comparison, Mainframe Computer, Minicomputer, Programming Language, Beginners

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The Simulation of Inventory Systems: An Overview

Article Abstract:

A survey of simulation techniques used in the modeling of inventory systems was conducted. Six categories of use were formed. Research published in each of the categories was described. Observations were drawn in cases where research was sparse or where researchers seemed to have treated an error improperly.

Inventory control, Models, Optimization, Stochastic Model, Validation

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