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Modeling slide show

If you use the Excel spreadsheet and if you need to build a model to analyze a problem, consider using VORSIM, an Excel-based modeling software package.It helps you build, modify and operate mathematical models using Excel spreadsheets in workbooks.VORSIM can build anything from small partial equilibrium models to large models with thousands of variables.

VORSIM 15 Website

VORSIM 14 Website

Shopping Cart


Information Sources

VORSIM Tutorials

Studies based on VORSIM models

Browse Userís Guide

VORSIM version 15 Model Builder


VORSIM software helps you build, simulate and manage models as Microsoft Excel spreadsheets.VORSIM 15 is required for Excel 2013 and 2016 while VORSIM 14 is needed for earlier versions of Excel.Both VORSIM versions operate similarly, however files and models built with VORSIM 14 must be converted to operate with VORSIM 15.This and other changes are explained on the VORSIM 15 website.

A trial version of VORSIM 15 and several supply-demand graph utilities can be downloaded FREE of charge from window.html.

Frequently asked questions!

E-Mail: info@vorsim.com 

Comments on the future of VORSIM

Microsoft, Windows, and Excel are trademarks owned by the Microsoft Corporation.The VORSIM trademark in the U.S. and abroad is owned by Vernon Oley Roningen, all rights reserved.  VORSIM software is copyright 1996, 1998 by Vernon Oley Roningen, all rights reserved.

VorsimVORSIM version 14 Model Builder

VORSIM 14 for earlier versions of Excel (97-2010) is still available on the Shopping Cart.Tutorials, the Userís Guide, and other VORSIM modeling illustrations are still useful in spite of the differences between versions 15 and 14.Models built with VORSIM 14 require conversion to operate with version 15.