Search found 10 matches
- Wed May 14, 2008 7:41 am
- Forum: SD Mailing List Archive
- Topic: QUERY Models, Problems and Systems
- Replies: 29
- Views: 98776
QUERY Models, Problems and Systems
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...
- Tue May 13, 2008 6:41 am
- Forum: SD Mailing List Archive
- Topic: QUERY Models, Problems and Systems
- Replies: 29
- Views: 98776
QUERY Models, Problems and Systems
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.....
- Sun May 11, 2008 7:13 am
- Forum: SD Mailing List Archive
- Topic: ANNOUNCE The Phillips Machine
- Replies: 7
- Views: 6487
ANNOUNCE The Phillips Machine
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 ...
- Fri Apr 25, 2008 6:34 am
- Forum: SD Mailing List Archive
- Topic: QUERY Society Strategy Development
- Replies: 127
- Views: 143700
QUERY Society Strategy Development
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...
- Mon Apr 21, 2008 6:38 am
- Forum: SD Mailing List Archive
- Topic: QUERY Definition of exogenous
- Replies: 5
- Views: 7486
QUERY Definition of exogenous
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'...
- Sun Apr 20, 2008 7:31 am
- Forum: SD Mailing List Archive
- Topic: QUERY Society Strategy Development
- Replies: 127
- Views: 143700
QUERY Society Strategy Development
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...
- Sun Apr 20, 2008 7:31 am
- Forum: SD Mailing List Archive
- Topic: QUERY Meaning of Stock/Level
- Replies: 46
- Views: 38846
QUERY Meaning of Stock/Level
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...
- Fri Jan 11, 2008 7:29 am
- Forum: SD Mailing List Archive
- Topic: QUERY Discrete event software (002)
- Replies: 13
- Views: 11269
QUERY Discrete event software (002)
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...
- Wed Sep 19, 2007 2:00 pm
- Forum: SD Mailing List Archive
- Topic: QUERY "Flawless Consulting" and SD
- Replies: 17
- Views: 12717
QUERY ""Flawless Consulting"" and SD
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...
- Tue Mar 20, 2007 11:30 am
- Forum: SD Mailing List Archive
- Topic: QUERY Please Capitalize System Dynamics
- Replies: 18
- Views: 13791
QUERY Please Capitalize System Dynamics
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 ...