Search found 17 matches

by Justin Lyon justin1028 yahoo.com
Tue Dec 13, 2005 12:01 pm
Forum: SD Mailing List Archive
Topic: SD and other modelling approaches
Replies: 41
Views: 40310

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)
by Justin Lyon justin1028 yahoo.com
Mon Dec 12, 2005 12:13 pm
Forum: SD Mailing List Archive
Topic: Advertizing Planning
Replies: 2
Views: 6500

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...
by Justin Lyon justin1028 yahoo.com
Fri Dec 02, 2005 12:03 pm
Forum: SD Mailing List Archive
Topic: Characterizing System Dynamics
Replies: 33
Views: 31387

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...
by Justin Lyon justin1028 yahoo.com
Mon Nov 28, 2005 11:56 am
Forum: SD Mailing List Archive
Topic: Characterizing System Dynamics
Replies: 33
Views: 31387

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: ...
by Justin Lyon justin1028 yahoo.com
Fri Nov 25, 2005 1:22 pm
Forum: SD Mailing List Archive
Topic: Agents, Emergence, Evolution, and SD
Replies: 4
Views: 8248

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...
by Justin Lyon justin1028 yahoo.com
Tue Nov 22, 2005 11:27 am
Forum: SD Mailing List Archive
Topic: Agents, Emergence, Evolution, and SD
Replies: 4
Views: 8248

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)...
by Justin Lyon justin1028 yahoo.com
Sat Oct 15, 2005 12:50 pm
Forum: SD Mailing List Archive
Topic: Biomass and Biodiesel
Replies: 1
Views: 3054

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...
by Justin Lyon justin1028 yahoo.com
Sat Oct 15, 2005 12:50 pm
Forum: SD Mailing List Archive
Topic: Pre-simulation indicators of usefulness
Replies: 10
Views: 8806

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...
by Justin Lyon justin1028 yahoo.com
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: 11295

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...
by Justin Lyon justin1028 yahoo.com
Sat Sep 10, 2005 1:07 pm
Forum: SD Mailing List Archive
Topic: Publications in Domain Journals
Replies: 5
Views: 5226

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, ...
by Justin Lyon justin1028 yahoo.com
Mon Sep 05, 2005 1:40 pm
Forum: SD Mailing List Archive
Topic: Strategy magazine article about Jay Forrester
Replies: 6
Views: 6123

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...
by Justin Lyon justin1028 yahoo.com
Fri Sep 02, 2005 11:51 am
Forum: SD Mailing List Archive
Topic: Strategy magazine article about Jay Forrester
Replies: 6
Views: 6123

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? ...
by Justin Lyon justin1028 yahoo.com
Wed Jul 20, 2005 11:27 am
Forum: SD Mailing List Archive
Topic: Measuring Systems Thinking Abilities
Replies: 12
Views: 9427

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 ...
by Justin Lyon justin1028 yahoo.com
Sat May 07, 2005 1:02 pm
Forum: SD Mailing List Archive
Topic: Presenting SD for the first time
Replies: 4
Views: 4746

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...
by Justin Lyon justin1028 yahoo.com
Thu May 05, 2005 1:56 pm
Forum: SD Mailing List Archive
Topic: MRP and Production Planning
Replies: 12
Views: 9583

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...
by Justin Lyon justin1028 yahoo.com
Mon Apr 25, 2005 12:29 pm
Forum: SD Mailing List Archive
Topic: Problem Solving versus Optimization
Replies: 8
Views: 7509

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...
by Justin Lyon justin1028 yahoo.com
Thu Apr 14, 2005 12:49 pm
Forum: SD Mailing List Archive
Topic: Systems Thinking
Replies: 2
Views: 3367

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...