Search found 17 matches
- Tue Dec 13, 2005 12:01 pm
- Forum: SD Mailing List Archive
- Topic: SD and other modelling approaches
- Replies: 41
- Views: 41800
SD and other modelling approaches
Posted by Justin Lyon <justin1028@yahoo.com> >> http://www.ifi.uib.no/sd/wp.html I've read Magne's _The World Model Controversy_ It's excellent. I strongly recommend reading it! -Justin Posted by Justin Lyon <justin1028@yahoo.com> posting date Mon, 12 Dec 2005 05:09:32 -0800 (PST)
- Mon Dec 12, 2005 12:13 pm
- Forum: SD Mailing List Archive
- Topic: Advertizing Planning
- Replies: 2
- Views: 6764
Advertizing Planning
Posted by Justin Lyon <justin1028@yahoo.com> H. Sedehi, We're doing lots with marketing and advertising for some of the world's biggest companies. See my blog for more info. Drop me a note. Would be happy to discuss via phone or I can pop over to Rome to meet with you. http://justinlyonandsimulation...
- Fri Dec 02, 2005 12:03 pm
- Forum: SD Mailing List Archive
- Topic: Characterizing System Dynamics
- Replies: 33
- Views: 32651
Characterizing System Dynamics
Posted by Justin Lyon <justin1028@yahoo.com> Don, I agree with your comments about jargon-heavy discussions. One of the primary reasons SD has not caught on is the SD community itself. It's a classic case of compensating feedback. As we move thru the tipping point for simulation science in 2006/2007...
- Mon Nov 28, 2005 11:56 am
- Forum: SD Mailing List Archive
- Topic: Characterizing System Dynamics
- Replies: 33
- Views: 32651
Characterizing System Dynamics
Posted by Justin Lyon <justin1028@yahoo.com> J.J. I tend to think of structure in a system dynamics simulation as a hierarchy of objects that provide insight into the interrelationships of the various objects. System Dynamics 'Structure' is a hierarchy of objects assembled in the following process: ...
- Fri Nov 25, 2005 1:22 pm
- Forum: SD Mailing List Archive
- Topic: Agents, Emergence, Evolution, and SD
- Replies: 4
- Views: 8617
Agents, Emergence, Evolution, and SD
Posted by Justin Lyon <justin1028@yahoo.com> Hi everyone, I've read Finn's book and it is excellent. Highly recommended. To quote from the epilogue: ""People who 'get' the Escher Cycle will implement it. Those who do not will not."" Well, Finn, thanks to your thinking and our con...
- Tue Nov 22, 2005 11:27 am
- Forum: SD Mailing List Archive
- Topic: Agents, Emergence, Evolution, and SD
- Replies: 4
- Views: 8617
Agents, Emergence, Evolution, and SD
Posted by Justin Lyon <justin1028@yahoo.com> Hi everyone, As part of Simudyne's focus on the convergence of ABM and SD in Simulation Science, I've been thinking about the linkages between evolution by natural selection (Darwin), agent-based modeling and emergence (Kaufman), the game of life (Conway)...
- Sat Oct 15, 2005 12:50 pm
- Forum: SD Mailing List Archive
- Topic: Biomass and Biodiesel
- Replies: 1
- Views: 3094
Biomass and Biodiesel
Posted by Justin Lyon <justin1028@yahoo.com> Leonardo, Yes, we are interested. One of my companies built the first web site for the USA National Biodiesel Board back in 1995 and I've continued to be a big fan of biodiesel for many years. I've cc'd a colleague of mine (Bev Thessen) at their office in...
- Sat Oct 15, 2005 12:50 pm
- Forum: SD Mailing List Archive
- Topic: Pre-simulation indicators of usefulness
- Replies: 10
- Views: 8956
Pre-simulation indicators of usefulness
Posted by Justin Lyon <justin1028@yahoo.com> Martin, For structuring an SD problem before sitting in front of a computer, I would recommend developing an architecture of the problem to be studied on a whiteboard using Dr. Warren's insights in competitive strategy dynamics. Check out two resources: h...
- Mon Sep 19, 2005 11:40 am
- Forum: SD Mailing List Archive
- Topic: All models are wrong (was Strategy magazine article about Ja
- Replies: 16
- Views: 11449
All models are wrong (was Strategy magazine article about Ja
Posted by Justin Lyon <justin1028@yahoo.com> Hi everyone, It is a difficult challenge to sell and market system dynamics. As a sales agent for several SD firms, I thought I’d share some of my thinking. Here's how we do it in the UK. I'd love to get feedback from the community. When we’re meeting wit...
- Sat Sep 10, 2005 1:07 pm
- Forum: SD Mailing List Archive
- Topic: Publications in Domain Journals
- Replies: 5
- Views: 5292
Publications in Domain Journals
Posted by Justin Lyon <justin1028@yahoo.com> Leonard and Jim, Here are two other interesting papers that touch on the applicability of simulation science (including agent based modelling and system dynamics) to social science modelling. I've cc'd Stephen Guerin, one of the authors of both articles, ...
- Mon Sep 05, 2005 1:40 pm
- Forum: SD Mailing List Archive
- Topic: Strategy magazine article about Jay Forrester
- Replies: 6
- Views: 6221
Strategy magazine article about Jay Forrester
Posted by Justin Lyon <justin1028@yahoo.com> Francisco and others, Please allow me to clarify and at the risk of starting a dialog (or even worse, a flame war) that many will have already discussed in the past . . . Simulation Science, in my mental model, is the application of 'linear science' **AND...
- Fri Sep 02, 2005 11:51 am
- Forum: SD Mailing List Archive
- Topic: Strategy magazine article about Jay Forrester
- Replies: 6
- Views: 6221
Strategy magazine article about Jay Forrester
Posted by Justin Lyon <justin1028@yahoo.com> Kim, I really do believe we are at the tipping point for system dynamics (what I like to call 'simulation science). This article lends further support to this arguement don't you agree? Thanks for pointing me to the article. What do you think of my blog? ...
- Wed Jul 20, 2005 11:27 am
- Forum: SD Mailing List Archive
- Topic: Measuring Systems Thinking Abilities
- Replies: 12
- Views: 9558
Measuring Systems Thinking Abilities
Posted by Justin Lyon <justin1028@yahoo.com> Martin, You asked: ""Is it an imperative to think in terms of flow and state variables in order to think ""right""."" Probably not, but it's so simple to add in stock and flow thinking into discussions, that it's a ...
- Sat May 07, 2005 1:02 pm
- Forum: SD Mailing List Archive
- Topic: Presenting SD for the first time
- Replies: 4
- Views: 4787
Presenting SD for the first time
Posted by Justin Lyon <justin1028@yahoo.com> Chander, I've found Designing the Future to be an interesting read for executives interested in how SD can improve decision making. It's a copy of a speach Dr. Forrester made at the Universidad de Sevilla in Spain. http://sysdyn.clexchange.org/sdep/papers...
- Thu May 05, 2005 1:56 pm
- Forum: SD Mailing List Archive
- Topic: MRP and Production Planning
- Replies: 12
- Views: 9773
MRP and Production Planning
Posted by Justin Lyon <justin1028@yahoo.com> Jean-Jacques, You make a good point about the power of qualitative modelling. I think that developing the CLD and then turning that into a architecture might provide you with a nice intermediate step between the purley qualitative CLD model of your situat...
- Mon Apr 25, 2005 12:29 pm
- Forum: SD Mailing List Archive
- Topic: Problem Solving versus Optimization
- Replies: 8
- Views: 7583
Problem Solving versus Optimization
Posted by Justin Lyon <justin1028@yahoo.com> I too have read the article and find the authors to be strong supporters of simulation and system dynamics for improving decision making. You will note that they base their scenarios on what I _think_ is a system dynamics simulation called Wonderland. Doe...
- Thu Apr 14, 2005 12:49 pm
- Forum: SD Mailing List Archive
- Topic: Systems Thinking
- Replies: 2
- Views: 3392
Systems Thinking
Posted by Justin Lyon <justin1028@yahoo.com> Francis, I´ve found Dr. Warren´s work to be an excellent introduction to systems thinking (what he refers to as stategy dynamics) for managers and executives. Here´s some more info on what he teaches: http://www.strategydynamics.com/ His book The Critical...