Search found 10 matches
- Wed Jul 30, 2008 7:12 am
- Forum: SD Mailing List Archive
- Topic: QUERY In-simulation linear programming
- Replies: 4
- Views: 5851
QUERY In-simulation linear programming
Posted by Khalid Saeed <saeed@WPI.EDU> Hazhir, Many years ago, one of my industrial engineering students attempted this by building the objective function and the constraints into the decision rules. as I recall, the optimal solution occurred when this system came to an equilibrium. I am not sure if...
- Tue May 27, 2008 6:23 am
- Forum: SD Mailing List Archive
- Topic: QUERY Limits to Growth Plan B
- Replies: 26
- Views: 28766
QUERY Limits to Growth Plan B
Posted by Khalid Saeed <saeed@wpi.edu> Let me first of all thank you all for the responses. Jack, I do not know the root cause yet, but am trying to formulate a hypothesis. Roy and Bob point to interesting evidence and beliefs. I personally do not think we carry out a rational economic analysis for ...
- Sat May 24, 2008 7:08 am
- Forum: SD Mailing List Archive
- Topic: QUERY Limits to Growth Plan B
- Replies: 26
- Views: 28766
QUERY Limits to Growth Plan B
Posted by Khalid Saeed <saeed@WPI.EDU> Jay’s assertion that population growth and industrial growth are the root causes for the environmental malaise should challenge us to look for a positive feedback between the two. If such a feedback exists, the entry point might be to curtail industrial growth ...
- Fri May 09, 2008 7:53 am
- Forum: SD Mailing List Archive
- Topic: QUERY Limits to Growth Plan B
- Replies: 26
- Views: 28766
QUERY Limits to Growth Plan B
Posted by Khalid Saeed <saeed@WPI.EDU> Gary, Those are great observations, but there exists considerable variability in the performance of social services related policies. I am also not sure about the efficacy of micro-finance. I think it is a great innovation that substitutes financial collateral ...
- Thu May 08, 2008 7:08 am
- Forum: SD Mailing List Archive
- Topic: QUERY Limits to Growth Plan B
- Replies: 26
- Views: 28766
QUERY Limits to Growth Plan B
Posted by Khalid Saeed <saeed@wpi.edu> As always, Jay's observations are most insightful. From the stand point of intervention, what can be done to reduce fertility and industrialization rates? Individuals may not voluntarily change their behavior for fear of losing their share of the commons. An in...
- Thu Jan 10, 2008 7:18 am
- Forum: SD Mailing List Archive
- Topic: QUERY Discrete event software (002)
- Replies: 13
- Views: 11218
QUERY Discrete event software (002)
Posted by Khalid Saeed <saeed@wpi.edu> George, A beautiful explanation! I wish to add that policy or decision rules in system dynamics are based not on discrete decisions, but on patterns of decisions. These patterns may vary according to the time frame over which a decision pattern is observed. The...
- Fri Aug 24, 2007 12:45 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Information display challenge
- Replies: 5
- Views: 5502
QUERY Information display challenge (SD6520)
Posted by Khalid Saeed <saeed@wpi.edu> Mike raises a good point. In my experience, using composite performance indicators in state space creates powerful graphics both for describing the problem and the model behavior in many instances. I have illustrated this graphic option in the following article...
- Sun May 20, 2007 1:43 pm
- Forum: SD Mailing List Archive
- Topic: ANNOUNCE Zimbardo lecture
- Replies: 6
- Views: 5363
ANNOUNCE Zimbardo lecture
Posted by Khalid Saeed <saeed@WPI.EDU> Barry Richmond built a simple and elegant model of Zimbardo's experiment and programmed it also as a story. I suggest contacting isee systems for a copy. Khalid Posted by Khalid Saeed <saeed@WPI.EDU> posting date Fri, 18 May 2007 12:00:08 -0400 ________________...
- Sun Apr 22, 2007 3:46 am
- Forum: SD Mailing List Archive
- Topic: QUERY Age of material in a stock
- Replies: 28
- Views: 26456
QUERY Age of material in a stock
Posted by Khalid Saeed <saeed@WPI.EDU> Jay's refreshing comment is timely. It tells us that analysis is a means to an end, not an end in itself. Khalid Saeed Posted by Khalid Saeed <saeed@WPI.EDU> posting date Fri, 20 Apr 2007 10:37:41 -0400 _______________________________________________
- Mon Mar 19, 2007 12:29 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Please Capitalize System Dynamics
- Replies: 18
- Views: 13770
QUERY Please Capitalize System Dynamics
Posted by Khalid Saeed <saeed@wpi.edu> We can also capitalize System Dynamics by working on big issues of the time, as Jay pointed out, and publishing our penetrating analyses and innovative policy insights. Khalid Saeed Posted by Khalid Saeed <saeed@wpi.edu> posting date Sun, 18 Mar 2007 13:31:45 -...