software process dynamics front cover

Software Process Dynamics

Welcome to the website for owners of Software Process Dynamics by Raymond J. Madachy and published by Wiley-IEEE Press. It supplements the book with models, tools, updates, discussion and additional information.

Home     Models     Tools     Description     Purchases


Free system dynamics simulation tool downloads are provided here for running all the models, modifying some of them and creating new ones.

isee Player from isee systems lets you view, run, print and share both iThink and STELLA models.  It will run the *.itm model files on this website. 
     Macintosh Ver 9.0.3 (8MB)
     Windows Ver 9.0.3 (7MB)
Also see the isee Player page at isee systems.

Ventana Systems provides free downloads for Vensim Demonstration, Vensim PLE (Evaluation or Educational), Vensim Model Reader, and Molecules.   These will let you view, run, print and share *.mdl model files and other types. 
     Vensim free download
More information on these and other product can be found at the Download Vensim Software page.

Tool Vendors

See the following companies for more information on tools.  They have trial downloads of their tools and may have updated free tool downloads.

Contact the author at for queries or submissions to this site.