Search found 68 matches

by Jean-Jacques Laublé jean-jacques
Tue Oct 10, 2006 2:17 pm
Forum: SD Mailing List Archive
Topic: QUERY Counter-insurgency and crime modeling
Replies: 10
Views: 7145

QUERY Counter-insurgency and crime modeling

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Kesten I thank you for your information on the site conflictforecasting.com. It is a wealth of resources about the subject. I have been pleased to know that a method called 'Field experiments' existed and will try to have some informa...
by Jean-Jacques Laublé jean-jacques
Tue Sep 19, 2006 2:25 pm
Forum: SD Mailing List Archive
Topic: QUERY Beer Game Simulation Performance Metrics
Replies: 15
Views: 12357

QUERY Beer Game Simulation Performance Metrics

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Jim There are two ways to avoid both the risk to introduce a bias influenced by the problem's view of the examiner by measuring the strategy of the player and the risk of introducing the eventual luck of the player by measuring the pl...
by Jean-Jacques Laublé jean-jacques
Mon Jan 09, 2006 1:15 pm
Forum: SD Mailing List Archive
Topic: The "usefulness" of SD
Replies: 18
Views: 31155

The ""usefulness"" of SD

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Scott About the PB representative liking simple back of the envelop solution I would ask him to show me how he would resolve the problem or any other problem using his method. I whould then transform his simple demonstration into a ve...
by Jean-Jacques Laublé jean-jacques
Sun Jan 08, 2006 3:06 pm
Forum: SD Mailing List Archive
Topic: The "usefulness" of SD
Replies: 18
Views: 31155

The ""usefulness"" of SD

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Etienne This thread is never going to end! I reread the original question from Colm. I reproduce the last phrases of his first post. <But, believe me, it doesn't matter what <stocks and flows are in our system, if we can't explain to ...
by Jean-Jacques Laublé jean-jacques
Sat Jan 07, 2006 2:34 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Tobi There have been in the last conferences some papers about multi-methodology and the advantages and drawbacks of different methods. You can consult the different papers on the SD association www.systemdynamics.org look at the conf...
by Jean-Jacques Laublé jean-jacques
Sat Jan 07, 2006 2:28 pm
Forum: SD Mailing List Archive
Topic: The "usefulness" of SD
Replies: 18
Views: 31155

The ""usefulness"" of SD

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Colm I recognize that there are not many documents about the usefulness of SD. But is it really specific to SD? Generally people do not like to document their results because it would make them depressive. Generally too because they a...
by Jean-Jacques Laublé jean-jacques
Fri Jan 06, 2006 1:01 pm
Forum: SD Mailing List Archive
Topic: The Logical Framework and SD
Replies: 6
Views: 10140

The Logical Framework and SD

Posted by Jean-Jacques Laublé <jean-jacques.lauble@wanadoo.fr> Hi Bill I was effectively wrong mentioning Jay Forrester instead of Jay Forrest. I hope they will excuse me for that mistake. Having never seen any Sders in my life I may easily mix their names. I reread the post from Jay Forrest as I fo...
by Jean-Jacques Laublé jean-jacques
Thu Jan 05, 2006 6:02 am
Forum: SD Mailing List Archive
Topic: The Logical Framework and SD
Replies: 6
Views: 10140

The Logical Framework and SD

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Everybody I feel that last posts from Bill, Colm and Keith bear sufficient analogies so as to suggest the following thoughts: The post is a bit long, and I hope that you will excuse me but I have not the time to mak...
by Jean-Jacques Laublé jean-jacques
Thu Jan 05, 2006 5:04 am
Forum: SD Mailing List Archive
Topic: Combining Discrete and Continous
Replies: 10
Views: 13141

Combining Discrete and Continous

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Tobi It is a question of definition. In continuous systems, the main characteristic is the aggregation of time into periods. You generally aggregate the inputs too but it is not an absolute necessity. In Powersim yo...
by Jean-Jacques Laublé jean-jacques
Thu Jan 05, 2006 4:26 am
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Tobi I agree with you that it would be easier if one could choose easily the tool depending on the kind of problem and that the kind of tool will influence the quality of the decision and the amount of work. About s...
by Jean-Jacques Laublé jean-jacques
Sun Jan 01, 2006 7:59 pm
Forum: SD Mailing List Archive
Topic: Combining Discrete and Continous
Replies: 10
Views: 13141

Combining Discrete and Continous

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Lou I have never tried to mix discrete event modelling to SD or even not tried to use discreet event modelling at all. Discrete event modelling is interested at the behaviour of individual events. It looks at realit...
by Jean-Jacques Laublé jean-jacques
Sat Dec 31, 2005 2:36 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Tobi. I find very comforting that Mercedes Benz my first supplier for more then 30 years is interested in SD as a tool. About your idea about classifying different methodologies, this was not a critic but the enumer...
by Jean-Jacques Laublé jean-jacques
Sat Dec 31, 2005 2:30 pm
Forum: SD Mailing List Archive
Topic: The "usefulness" of SD
Replies: 18
Views: 31155

The ""usefulness"" of SD

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Fred The problem of acceptance discussed in this thread has to my opinion nothing to do with trying to be accepted at the 'table'. To be accepted at the table you need as you say a 'personality' that has nothing to ...
by Jean-Jacques Laublé jean-jacques
Mon Dec 26, 2005 5:27 am
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody There are many things about SD that have been said lately and that are very true. But I think it is not a reason to be ashamed to use a SD or not to dare to say that one uses it. The method and the paradig...
by Jean-Jacques Laublé jean-jacques
Sat Dec 24, 2005 8:00 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody The idea of deciding which modelling technique is better adapted to a problem, while being a fantastic idea may be practically very difficult to realize. The first reason is that there is no method to char...
by Jean-Jacques Laublé jean-jacques
Tue Dec 20, 2005 12:09 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Kim I agree with 'nearly' everything you wrote. I never said that modelling the problem as it is really is not a good solution. I said it is as long as it is possible to do it, and as long as you do it correctly, me...
by Jean-Jacques Laublé jean-jacques
Mon Dec 19, 2005 11:50 am
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody Jay writes in his last post <but I believe the bulk of <our potential clients see SD as too spartan and thus discount it. This is certainly the heart of the SD problem, but do the potential clients dislike...
by Jean-Jacques Laublé jean-jacques
Sun Dec 18, 2005 1:52 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody Geoff writes <Some correspondents have used phrases such as 'the world is made up of <stocks and flows'. To be sure, a stock/flow viewpoint, that emphasises <continuity is a powerful viewpoint for some cla...
by Jean-Jacques Laublé jean-jacques
Fri Dec 16, 2005 12:29 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody The drawback I described in my last post, is not depending only on the experience of modellers but is too very depending on the kind of subject. It seems evident but it is better to mention it. The fact th...
by Jean-Jacques Laublé jean-jacques
Thu Dec 15, 2005 12:04 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody Geoff writes <This is an interesting correspondence though it does not seem to have <answered the original question, which was about SD and other modelling <approaches. In that context I have always felt t...
by Jean-Jacques Laublé jean-jacques
Thu Dec 15, 2005 12:02 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40297

SD and other modelling approaches

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi everybody. Fadl asked a difficult question. Instead of listing many advantages or drawbacks that will automatically bring contestations and complexity, I tried to figure out the main advantage and the main drawback,...
by Jean-Jacques Laublé jean-jacques
Sat Dec 03, 2005 1:04 pm
Forum: SD Mailing List Archive
Topic: Aggregation and Behavior
Replies: 2
Views: 6230

Aggregation and Behavior

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Francisco There has already been in the past discussions on aggregation. See the forum http://www.ventanasystems.co.uk/forum/ and make a research on 'aggregat' on the SD list archives. About your specific question, ...
by Jean-Jacques Laublé jean-jacques
Sat Dec 03, 2005 12:58 pm
Forum: SD Mailing List Archive
Topic: Characterizing System Dynamics
Replies: 33
Views: 31377

Characterizing System Dynamics

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Invig (or should I say Invigorator instead of Invigilator) 300 years ago, when the first results of calculus where known after Pascal, Leibniz, Newton, Euler and some others, the scientific community must certainly ...
by Jean-Jacques Laublé jean-jacques
Fri Dec 02, 2005 12:01 pm
Forum: SD Mailing List Archive
Topic: Agents, Emergence, Evolution, and SD
Replies: 4
Views: 8240

Agents, Emergence, Evolution, and SD

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi John I agree with you that a closed system is the best solution to explore its dynamic as there is no foreign, independent and unexplained influence on it (the outside word). The problem is whether it is always poss...
by Jean-Jacques Laublé jean-jacques
Fri Dec 02, 2005 11:56 am
Forum: SD Mailing List Archive
Topic: Characterizing System Dynamics
Replies: 33
Views: 31377

Characterizing System Dynamics

Posted by =?iso-8859-1?Q?Jean-Jacques_Laubl=E9?= <jean-jacques.lauble@wanadoo.fr> Hi Don I leave the exact definition of SD to the head designer of the field Jay Forrester, who knows better than me. As a user there is a strong difference between the tools, highly based on mathematics, offered and th...