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From Sigma

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(Sigma)
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Revision as of 20:30, 20 July 2008

Contents

Simulation

Discrete Event Simulation

Event Relationship Graphs

Sigma

SIGMA is based on the simple and intuitive Event Relationship Graph (sometimes called an ERG or Event Graph) approach to simulation modeling. The SIGMA project began as an effort to implement the notion of Event Relationship Graphs on personal computers and has evolved into a powerful and practical method for simulation modeling. SIGMA, the Simulation Graphical Modeling and Analysis system, is an integrated, interactive approach to building, testing, animating, and experimenting with discrete event simulations, while they are running. SIGMA is specifically designed to make the fundamentals of simulation modeling and analysis easy. SIGMA is able to translate a simulation model automatically into fast C source code that can be compiled and linked to the sigmalib.lib library to run from a spreadsheet or web interface. SIGMA can also write a description of a simulation model in English. SIGMA was developed without external or University funding.

The specific function of SIGMA files are identified by the extensions to their filenames as in following table. .

Extension File Type Indicated
row 1, cell 1 row 1, cell 2
row 1, cell 1 row 1, cell 2
row 1, cell 1 row 1, cell 2
row 1, cell 1 row 1, cell 2



Extension File Type Indicated

.BAK Backup copy of the last saved model .BAT Batch files .BMP Bitmaps used for animations .C Source code in C .DAT Data files for SIGMA models .EXE Executable programs .EXP Experiment file for batched runs (chpt. 11) .H Source code in C .LIB SIGMA C Function Library .MOD Sample SIGMA models .OUT SIGMA output files (if any)


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