COSMOS: a simulation language for continuous, discrete and combined models

Article Abstract:

COSMOS is a new simulation language for description of continuous, discrete or combined continuous/discrete models. For continuous models, the COSMOS language definition constitutes a superset of CSSL with many additional structuring elements being incorporated, e.g. for convenient modelling of piecewise continuous models and variable structure systems. Discrete models are coded according to the process interaction world view. The design of the language constructs makes it possible to write simulation programs in accordance with modern software engineering methodology. The model and experiment description, for example, are totally separated. In addition, models can be separated into submodels. (Reprinted by permission of the publisher.)

Technology, Product introduction, Technical, Modeling, Data modeling software, Simulation Languages, Continuous Simulation, Scientific Research, Program Development Techniques, New Technique

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Optimization of the Maintenance Process

Article Abstract:

A comprehensive preventive maintenance program minimizes equipment breakdowns and cuts operating costs, which in turn improves productivity. A mathematical definition of the maintenance process and criteria for its optimization is presented in two stages: (1) structural optimization of maintenance process by selecting an appropriate repair strategy and (2) parametrical optimization consisting of choosing optimal (based on assumed criterion) times and scopes of repair actions. General classification of the repair strategies, their characteristics and results of simulation experiments are presented.

Mathematical models, Manufacturing, Maintenance, Efficiency, Criteria, Maintenance Applications, Preventive Maintenance

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Combined Simulation and Network Optimization Analysis of a Production-Distribution System

Article Abstract:

Network optimization analysis of a production-distribution system consists of three interacting activities, which are, production, demand, and distribution. Logic patterns and figures are presented which describe the simulation-optimization program used. A hypothetical problem of a chair manufacturer is used to test the optimization analysis. The IBM 360-70 computer was used for development of the procedures.

Production control, Industrial engineering, Demand, Production, Distribution Management, Analysis, Network Models

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