Ventana software support forum

Posted by George Richardson <gpr@albany.edu> [The SD Mailing list is closing. Please go to=20 http://www.systemdynamics.org/forum to post announcements and continue the discussion ] =20 Announcement of Professional Vacancy Director of the Center for Technology in Government The University at Albany ...

Posted by George Richardson <gpr@albany.edu> The suggestion that we can ""model systems"" seems to me like the assignments that buffaloed me when I was an undergraduate: ""Write a 2000-word essay on Hamlet,"" or ""...19th century England,""...

Posted by George Richardson <gpr@albany.edu> On Apr 21, 2008, at 6:38 AM, SDMAIL Jack Harich wrote: > Maybe it's more like nouns versus verbs. Variables that are verbs > (rates) have a unit per time period, like persons/year. Nouns have only > the unit, like persons. Verbs cannot be a stock, but nou...

Posted by George Richardson <gpr@albany.edu> On Apr 9, 2008, at 7:59 AM, SDMAIL Alan McLucas wrote: > ""Trust"" is an intangible which > cannot be represented by this integral equation. Therefore, we cannot > build system dynamics models that contain stocks of intangibles such as...

Posted by George Richardson <gpr@albany.edu> Jean wrote: > I have thought during the week end about what is exactly an exogenous > variable. I found that I had not like you a clear understanding of > what it was exactly. A good first cut at what the concepts ""endogenous"" and &q...

Posted by George Richardson <gpr@albany.edu> Beyond the questions of software and integration of approaches are questions about the nature of ""reality"" that have puzzled me about discrete event simulation. (Of course, others have questioned the fit between reality and our conti...

Posted by George Richardson <gpr@albany.edu> In the recent discussion on implementation one poster wrote: > The big difficulty with groups, is that most people will not be ready to > express publicly their intimate interests, supposing they are > conscious of them. > So I do not believe much in grou...

Posted by George Richardson <gpr@albany.edu> A good debrief of the beer game takes an hour-and-a-half by itself, so I'd say don't even try to run the game and debrief it in 1.5 hours. There a layers of insights from the game, from surface thoughts about the availability of information to very deep t...

Posted by George Richardson <gpr@albany.edu> The writer of this query suggests that system dynamics can not be effective in dealing with social problems because we don't know future social system structure. It's worse than that, I suppose, because we can't even know current social system structure f...

Posted by George Richardson <gpr@albany.edu> The writer of this query suggests that system dynamics can not be effective in dealing with social problems because we don't know future social system structure. It's worse than that, I suppose, because we can't even know current social system structure f...

Posted by George Richardson <gpr@albany.edu> On Oct 2, 2007, at 8:00 AM, SDMAIL Jason Foster wrote: > As part of my lecturing, I was hoping to find a graphical depiction of > the World3 model that all appears on one page. On pp. 132-133 of Randers 1980 book Elements of the System Dynamics Method, th...

Posted by George Richardson <gpr@albany.edu> On Oct 2, 2007, at 8:00 AM, SDMAIL Jason Foster wrote: > As part of my lecturing, I was hoping to find a graphical depiction of > the World3 model that all appears on one page. On pp. 132-133 of Randers 1980 book Elements of the System Dynamics Method, th...

Posted by George Richardson <gpr@albany.edu> On Sep 8, 2007, at 7:10 AM, SDMAIL Jim Hines wrote: > You're right that defining a problem in terms of reference modes > pre-supposes that people have already decided to use SD. I don't think that's quite right. It presupposes that you want to address a d...

Posted by George Richardson <gpr@albany.edu> On Sep 3, 2007, at 8:26 AM, SDMAIL Richard Stevenson wrote: > Today I received several personal emails from SD mail subscribers > around the world who all (my summary) said, ""we have given up > subscribing to this forum because many people cons...

Posted by George Richardson <gpr@albany.edu> On Sep 2, 2007, at 7:38 AM, SDMAIL David Rees wrote: > Posted by ""David Rees"" <david.rees@hpls.co.nz> > > While concept models are an important part of developing > understanding and engagement in the SD process it seems to me that >...

Posted by George Richardson <gpr@albany.edu> >On Apr 20, 2007, at 5:33 AM, SDMAIL Jay W. Forrester wrote: > Can someone supply some examples of where the way of computing age in >a stock will alter the direction of policy recommendations to improve >the behavior of a system? Great question. We have ...

Posted by George Richardson <gpr@albany.edu> >On Apr 5, 2007, at 6:04 AM, SDMAIL ybarlas wrote: > how about sysdyn? (A sysdyn method, sysdyn model, sysdyn approach...) Things come around. Here's a minor historical note: ""Sysdyn"" was the name I gave to the program of subroutines...

Posted by George Richardson <gpr@albany.edu> Lots if interesting, sophisticated thoughts here. I wonder if we might take a rather simple (unsophisticated?) instrumental approach. Suppose we think that in something we are writing ""system dynamics"" (small S, small D) would be int...

Posted by George Richardson <gpr@albany.edu> On Mar 6, 2007, at 5:25 AM, System Dynamics Mailing List wrote: > Posted by ""Megan Hopper"" <mhopper83@hotmail.com> I was wondering if > anyone has seen SD research about volunteering. My first thoughts on this interesting question ar...

Posted by George Richardson <gpr@albany.edu> > SD has been regarded as a useful framework for theory development. > Why is a theory created under this paradigm often called a theory of > behavior? Why is the same theory not called a theory of structure? I think we do tend to think of model structure...