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What is System Dynamics?
System dynamics is a methodology for studying and managing complex feedback systems, such as one finds in business and other social systems. In fact it has been used to address practically every sort of feedback system. While the word system has been applied to all sorts of situations, feedback is the differentiating descriptor here. Feedback refers to the situation of X affecting Y and Y in turn affecting X perhaps through a chain of causes and effects. One cannot study the link between X and Y and, independently, the link between Y and X and predict how the system will behave. Only the study of the whole system as a feedback system will lead to correct results.
The methodology:
- identifies a problem,
- develops a dynamic hypothesis explaining the cause of the problem,
- builds a computer simulation model of the system at the root of the problem,
- tests the model to be certain that it reproduces the behavior seen in the real world,
- devises and tests in the model alternative policies that alleviate the problem, and
- implements this solution.
Rarely is one able to proceed through these steps without reviewing and refining an earlier step. For instance, the first problem identified may be only a symptom of a still greater problem.
The field developed initially from the work of Jay W. Forrester. His seminal book Industrial Dynamics (Forrester 1961) is still a significant statement of philosophy and methodology in the field. Since its publication, the span of applications has grown extensively and now encompasses work in
- corporate planning and policy design
- public management and policy
- biological and medical modeling
- energy and the environment
- theory development in the natural and social sciences
- dynamic decision making
- complex nonlinear dynamics
Source: System Dynamics Society (www.systemdynamics.org)
Comments (4)
- Comment by: USETSnellie
- Date: December 13, 2011
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- Comment by: Marden
- Date: July 21, 2011
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- Comment by: deseeSmolo
- Date: March 16, 2011
Sometimes I like a little something extra out of my online gaming. There has been a lot of buzz lately about websites where we can put some cash down on our online gaming for xbox or PS3. I have used several of these sites and thought I would share my experiences with them. Virgin Gaming: http://virgingaming.com/ Pros: Big cash prizes, automatic reporting Cons: Noobish user base, inconsistent website makes it hard to find a match sometimes Virgin is the biggest player with the most marketing dollars behind their site, but their inconsistent website is buggy and confusing. They have automatic reporting on all matches and a wide selection of games, but there seems to be many low rent players who use the service and its hard to find a good challenge. Rivalspot: http://www.rivalspot.com/ Pros: Weekly free tournaments with nice prizes, automatic reporting, great website Cons: Still not a lot of users, less games Rivalspot is a newcomer with a lot of potential, but they are still a bit young. They have weekly tournaments posted on their Facebook page where you can play for free and have a reasonable chance at winning a cash prize at the end. I like their blog, where they post a lot of great sports content, and there are a lot of great players who use the site - it is just still starting out so there aren't as many users online at any given time. Gamersaloon: http://www.gamersaloon.com/ Pros: Easy to find a game, good userbase, good game selection Cons: No automatic reporting Gamersaloon could be a strong player but to me the lack of automated reporting is a deal breaker. I just can't bring myself to trust some guy in some unknown part of the country being honest about the fact that I just pwned him. Overall I always try Rivalspot first - they have the most potential IMHO, and when I can't find a match there I jump on to Virgin. I know there are other similar sites out there, so I was hoping to make this into a thread where we can post about our experiences and maybe hook up for some cash gaming.
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