Ventana software support forum

I am constructing a new SD Society home web page and would appreciate some suggestions for: * a 200 to 500 word description of SD for the novice * a 200 to 500 word description of the relation of SD to Systems Thinking * Nominations for a short bibliography of key SD books (authors -- please send me...

It sounds like a course in programing rather than a course in theories for
sustainable futures. May I urge you to sharpen your focus.

Jack Pugh
From: JandJpugh@aol.com

The System Dynamics Society has been in existence 13 years. We have achieved=20 most of our initial priorities. Now it is time for the society to review the=20 purposes for which it was organized and perhaps to set new priorities.=20 Participation by the whole society necessary if we are to generate...

Comments in reply to Bill Harriss comments! SD and DES are quite different paradigms although both involve feedback. SD builds models using ordinary (not partial) differential equations; DES builds models with difference equations that generally (always?) incorporate probabilistic behavior. Both met...

Which is better depends on the questions that you wish to answer. If you are worried about manufacturing floor layout, machine scheduling, machine downtown and the like use discrete modeling. Alternatively, if you want to relate manufacturing to product development and marketing use SD. Jack Pugh Fr...

The four original SDers (Forrester, Fey, Pugh, and Roberts) were all familiar with diagramming techniques used in servomechanisms. We adopted those methods to our requirements. Our first were the familiar level, auxiliary, rate diagram. The simpler word and arrow diagram was reinvented by I dont kno...