Ventana software support forum

Posted by ""John Morecroft"" <jmorecroft@london.edu> Bill Thanks for your reflections (quoted below) stemming from system engineering. Yes, parsimony is a good word to describe the convergence and focus that modellers ultimately seek. However the advice to iteratively model the d...

Posted by ""John Morecroft"" <jmorecroft@london.edu> Jack (Homer) I was struck by your observation that a well defined problem situation can actually be broader than the 'perceived' system. So I ended-up spending part of a sunny May Sunday thinking about model conceptualisation.....

Posted by ""John Morecroft"" <jmorecroft@london.edu> Adrian Your comment about nostalgia for the Phillips machine reminded me about Bill Ryder, a US-based member of the SD community, who took a special interest in the machine. When he visited the UK in 2004 (to attend the Oxford ...

Posted by ""John Morecroft"" <jmorecroft@london.edu> Bill Thanks for your stimulating thoughts, scenarios and weblinks about the major transitions we all now face. System dynamics surely does have an important role to play in this vast arena - and a good track record too. Regards...

Posted by ""John Morecroft"" <jmorecroft@london.edu> I enjoyed the exchange of ideas stemming from Jean-Jacques' question about the definition of exogenous. George (Richardson) provided succinct definitions of exogenous and endogenous variables and also referred to Jay Forrester'...

Posted by ""John Morecroft"" <jmorecroft@london.edu> Kim, In 2028, at a party to celebrate the continuing success of system dynamics, I would like to see the following guests: Twenty people who, at any time since 2000, have graduated with PhDs and majored in system dynamics. Thes...

Posted by ""John Morecroft"" <jmorecroft@london.edu> I fully agree with Bob Eberlein when he says: ""any variable that can change only over time, needs to be treated as a stock. In fact, even in everyday language, we speak of things such as building anger, rising emotio...

Posted by ""John Morecroft"" <jmorecroft@london.edu> Bill, There are a few corrections I'd like to mention for your summary of SD and DES. In the section on PAPERS/ARTICLES/BOOKS there is the following reference: ""Explaining Puzzling Dynamics: Comparing the Use of Syst...

Posted by ""John Morecroft"" <jmorecroft@london.edu> I found Jack Homer's comments to be very helpful and insightful. His view rings true - that data, like the model's structure, emerges iteratively. I must re-read 'Why we iterate ....' SDR 12(1) 1996. John Morecroft Adjunct Asso...

Posted by ""John Morecroft"" <jmorecroft@london.edu> My preference is to continue the use of system dynamics without capitals. The topic of capitalisation cropped-up for me recently with an edited book on methods and models for strategic development (Supporting Strategy, editors ...