Search found 12 matches
- Wed May 07, 2008 7:09 am
- Forum: SD Mailing List Archive
- Topic: QUERY Models, Problems and Systems
- Replies: 29
- Views: 96922
QUERY Models, Problems and Systems
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> PROBLEM However novice modelers carry out SD projects, they will rarely get simple models. This is a big problem when they should build a simple model. The problem has been discussed in the recent issues of SDR, but its root cause has not yet been cl...
- Fri May 02, 2008 7:45 am
- Forum: SD Mailing List Archive
- Topic: ANNOUNCE Tsunami Wave Prediction Paper
- Replies: 0
- Views: 3115
ANNOUNCE Tsunami Wave Prediction Paper
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> For over fifty years, a number of SD projects have been involved in the reproduction of problematic behaviors. Rarely has SD been used for point prediction, particularly when what to be reproduced are not reference modes but 'reference points'--the v...
- Sun Feb 10, 2008 7:52 am
- Forum: SD Mailing List Archive
- Topic: QUERY Do marginal models marginalize modeling?
- Replies: 13
- Views: 11327
QUERY Do marginal models marginalize modeling?
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> The lack of formal SD education has been deemed as a reason why there are too many models that do not meet SD experts' minimum standard of quality. Here, there is a tendency to restrict the application of SD to ""SD problems""--un...
- Mon Dec 10, 2007 7:11 am
- Forum: SD Mailing List Archive
- Topic: QUERY Policy paradox and SD
- Replies: 21
- Views: 22720
QUERY Policy paradox and SD
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> Dear all, Structural confirmation is a primary test of model validity. If model components and equations can be easily recognized, the model would pass this test. This is not a strong test. A big problem occurs when policies are easily recognized but...
- Thu Oct 04, 2007 6:27 am
- Forum: SD Mailing List Archive
- Topic: QUERY Structural changes and validity
- Replies: 17
- Views: 12527
QUERY Structural changes and validity
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> Dear all, Structual validation is key to the success of model development. However, we have no test to determine whether a given model structure is stable over the time horizon of interest. Basic mechanisms may at best represent the ""past ...
- Thu Oct 04, 2007 6:27 am
- Forum: SD Mailing List Archive
- Topic: QUERY Structural changes and validity
- Replies: 17
- Views: 12527
QUERY Structural changes and validity
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> Dear all, Structual validation is key to the success of model development. However, we have no test to determine whether a given model structure is stable over the time horizon of interest. Basic mechanisms may at best represent the ""past ...
- Sat Aug 18, 2007 12:57 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Public Policy Analyses
- Replies: 1
- Views: 2760
QUERY Public Policy Analyses (SD6518)
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> Dear Sir, In an evaluation of public policy, there are four analyses: public hearing, cost-benefit analysis, technical feasibility study, and system dynamic modeling. >From system dynamics' perspective, which analysis should be given a serious consid...
- Wed Mar 28, 2007 12:20 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Renaming System Dynamics (was Capitalize System Dynami
- Replies: 24
- Views: 15624
QUERY Renaming System Dynamics (was Capitalize System Dynami
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> I am reading the introductory book by Nancy Roberts and others. They stress the importance of policy choices in system dynamics. So let's me apply the concept to this issue. There are options to solve the searching problem. Renaming is a policy choic...
- Sun Mar 25, 2007 12:48 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Renaming System Dynamics (was Capitalize System Dynami
- Replies: 24
- Views: 15624
QUERY Renaming System Dynamics (was Capitalize System Dynami
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> WAS Please Capitalize System Dynamics (SD6350) Toward the new name, I suggest one name for the field. System dynamics may become 'systemdynamics'. The advantages of this term are as follows: 1. The term has already entered common parlance among syste...
- Tue Mar 20, 2007 11:24 am
- Forum: SD Mailing List Archive
- Topic: QUERY Please Capitalize System Dynamics
- Replies: 18
- Views: 13749
QUERY Please Capitalize System Dynamics
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> Fields like servomechanism and cybernetics have no problem with the usage of their names. There are two things in common. 1. Use single term as the fields' names 2. Be dictionary entries. System dynamics, by contrast, lacks these properties. Two word...
- Sun Feb 11, 2007 2:34 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Future Development Directions
- Replies: 32
- Views: 21047
QUERY Future Development Directions
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> I strongly agree with Bob that, fundamentally, good system dynamics is simply good science. Reproducibility is vital to good science. What is the scientific method in SD? We know how to predict the implication of a given policy, but this is still unc...
- Tue Feb 06, 2007 2:20 pm
- Forum: SD Mailing List Archive
- Topic: QUERY Structural or Behavioral Theory
- Replies: 5
- Views: 6161
QUERY Structural or Behavioral Theory
Posted by Monte Kietpawpan <kietpawpan@yahoo.com> 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? If scientific theories must explain why things ...