VorsimbnVORSIM slide show

Modeling slide show

The company VORSIM closed business as of 12/31/2020.

VORSIM software and models are no longer for sale on this website; consulting services are no longer provided. However as a courtesy to existing VORSIM users, the VORSIM website will be maintained to provide information and the Userís Guide through 9/2018. See the Giveaway Notice below on this page.

Questions? Email: vernon.roningen@gmail.com

VORSIM 15Website

VORSIM 14Website

Information Sources

VORSIM Tutorials

Browse Userís Guide

VORSIM version 15 Model Builder


VORSIM 15 is required for Excel 2013 and later versions; VORSIM 14 is needed for earlier versions of Excel.Both versions operate similarly; however file structures have changed beginning with Excel 2013.Filesbuilt with VORSIM 14 must be converted to Excel 2013 or 2016 formats.See the VORSIM 15 website for details.

Giveaway Notice:VORSIM 15 and several supply-demand graph utilities can be downloaded FREE of charge from Free Downloads.html.

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 is for earlier versions of Excel (97-2010).

To get VORSIM go to Getting VORSIM