Reading Supporting Material

Supporting Material files can be found by clicking on the appropriate link in the Paper and Workshop Index, found on the conference website. Papers are listed alphabetically by the last name of the primary author.

Ø Viewing/Opening/Reading the Supporting Material:
Supporting materials will contain either a single file, or a PKZip® format file which can be opened with any number of utilities or directly on some operating systems. Supporting materials may include plain text files or other commonly used file types. In addition, models may be included and these will have file extensions that depend on the software used to create them. Below, find information on how to access freeware/demo/trial versions for regularly used software from several system dynamics software publishers. Follow the links within the descriptions below to the software needed to view the files.
In following chart, find the three-letter extension of the file name, then the software you need to view the file.


  File Name Extension:

 .itm, .stm



 .vmf, .vpa, .vpm, .mdl

  Software Needed:

 iThink, STELLA

 Powersim Studio



STELLA/iThink by isee systems:

This link will navigate you to the FREE isee Player. The isee Player lets you view, run, print and share both STELLA (.stl) and iThink (.itm) models. Available in both Windows and Macintosh versions, the isee Player allows exploration of all model layers - map, model, equation, and interface, and never "times out."

Powersim Studio by Powersim Solutions:

A free and fully-functional 30-day trial version of Powersim Studio 8 Enterprise edition is available for download. Studio 8 contains an array of new and exciting features. In addition it can:

·  Perform scenario control, optimization, risk analysis and risk management
·  Try setting up a user interface and test it in presentation mode
·  Include events, command buttons and actions to set up a cockpit
·  Keep your model international using multiple languages on your model
·  Share different levels of information using password protection
·  Connect to any datasets, Excel, Access, Oracle and SAP NetWeaver

Note that a Studio 8 installation will automatically replace any previous version of Studio.

Vensim by Ventana Systems:

The Vensim Model Reader can be used to open Vensim models which are files with extension .vmf, .vpm or .vpa. This is free software which will allow you to view and simulate models changing the assumptions but not model structure. Many models (.vmf, .vpm, and .mdl) can also be opened using Vensim PLE which is free for educational use. Both PLE and the Reader are available from:

September 15, 2011