Ventana software support forum

>From "William Steinhurst" <wsteinhu@psd.state.vt.us> >Difficult and confusing, certainly. Unrealistic, often. But weak? >Could you clarify? JWF reply: They do not deal usefully with nonlinearity or high order systems, and especially not both together. Jay W. Forrester Professor of Managem...

In (SD0901), Jaideep Mukherjee asked that I comment on experience with system dynamics in K-12 education, apparently in regard to their not having had a background in ordinary differential equations. Elsewhere* I have written: ------------------------------------------------------- 15. Differential ...

On the nature of system dynamics and modeling, perhaps the following will be useful to you. ----------------------------- You can get a system dynamics bibliography that has over 3000 entries: To order the system dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US ...

>>>>>Date: Tue, 6 May 1997 10:42:45 +0200 >>>>>To: nlux@MIT.EDU >>>>>From: jmachuca@cica.es (Jose Antonio Dominguez Machuca) >>>>>Subject: About the Beer Game >>>>> >>>>>Dear Nan: >>>>> >>>>> I hope everything is going well with you. Do you know who was the >>>>>creator of the Beer Game? was it Jay?...

The Vensim software includes facilities for doing automatic variation of all parameters and ranking the results on a specified criteria. Jay W. Forrester Professor of Management, Emeritus and Senior Lecturer, Sloan School Massachusetts Institute of Technology Room E60-389 Cambridge, MA 02139 tel: 61...

Perhaps a diversion and a bit of history will be of interest to the system dynamics and K-12 discussion groups, even if it does nothing to promote the frontier of system dynamics. I received the following email from Chris Trost, Ctrost@aol.com, referring to his two system dynamics subjects at MIT: >...

REPLY to: Differential equations (SD0910) From:Bill Harris >Some on this list seem to >have argued in favor of SD being practiced only after serious study in a >university program (at the graduate level?) with the opportunity for the >prospective SD person to receive feedback on their modeling effor...

Reply to: Differential equations (SD0918) >Have the creators of Road Maps considered offering an electronic course. The suggestion of an electronic course based on present and future "Road Maps" is an interesting idea. Being able to do so would depend on financial support, which would need...

Recent communications from Mukherjee (SD0788), Rodrigues (SD0784, SD0789, SD0792), and from others have raised the question of a theory of system dynamics. I see system dynamics as a profession similar to engineering or medicine. System dynamics is devoted to designing policies to create systems wit...

The following message from the K-12 discussion group may be of interest to the system dynamics list. Jay W. Forrester jforestr@MIT.EDU ------- Forwarded Message Date: Wed, 26 Mar 1997 10:40:17 -0800 From: dfisher@pps.k12.or.us (Diana M. Fisher) Subject: Re: Systems THinking outside classroom To Mr. ...

Perhaps the following will help: -------------------------------------------- You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society University at Alba...

Perhaps you will find useful information here: ----------------------------- You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society University at Alban...

It appears that my previous message asking for more identification on the discussion group messages was not clear. I had only hoped we could have a few lines more than just a name at the bottom of each message. Some people have sent me full biographies, and others made suggestions for a web page wit...

Here is some resource information sent by Jay Forrester (jforestr@MIT.EDU) You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society 49 Bedford Road Linco...

The following information may be of use to you: Jay W. Forrester jforestr@MIT.EDU ------------------------You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamic...

Perhaps the following information will be useful to you. ------------------ You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society 49 Bedford Road Linc...

The following may be of use to you: Jay W. Forrester jforestr@MIT.EDU ------------------------- You can get a system dynamics bibliography that has over 3000 entries: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society ...

Modeling of issues in developing countries has been done for many years
by Gerald Barney:

GERALD O. BARNEY
INSTITUTE OF 21ST CENTURY STUDIES
1611 NORTH KENT ST., SUITE 610
ARLINGTON VA 22209-2111

tel: 703-841-0048
fax: 703-525-1744
email: millennium@igc.apc.org

I very much agree with the March 24 communication from George Richardson: Re: SDR Reformatting, Comment#3. The future of system dynamics rests on high quality work that serves a useful, practical purpose. Dangers lie in proliferation of models that are trivial, and in modeling that addresses only ac...

In his March 20 communication, Wolpert observes, " During the past five years 25% of my time has been spent in Phase II: trying to introduce the model and its implications. I am finding terrific resistance in Phase II. My first hand awareness of this resistance has made it clear that Phase II r...

Comment on Feb. 4 email by George Richardson <GR383@ALBNYVMS.BITNET> George comments "It has always seemed puzzling to me that the conditions for mathematical chaos in continuous systems are more restrictive than in discrete representations (at least three stocks, for example, instead of just o...

Jim Neale <jneale@ac.dal.ca> asked me how to obtain the system dynamics bibliography. Perhaps others will be interested: Order System dynamics bibliography, specify IBM type PC, or Macintosh Send $35 in US$ drawn on a US bank to: System Dynamics Society 49 Bedford Road Lincoln, MA 01773 USA Tel: 617...

Glitz on Jan 10 asked about references on models of illegal drug use. The following are from the System Dynamics Bibliography, which can be obtained on computer disk. Levin, Gilbert, Gary B. Hirsch, and Edward B. Roberts. (1975). The Persistent Poppy: A Computer Aided Search for Heroin Policy. Cambr...

On Dec. 18, Stephen Robbins asked for references on soft variables. There may not be a full specific discussion of the subject, but various insights have been discussed in some of my writing. I will give the references. However, there is no sharp distinction between hard and soft variables. Take an ...