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CBT Chapter 2 — From Model Structure to System Behavior
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In this main part of the TWINS Module 1 CBT you will get the opportunity to work on several models of dynamical processes from different fields of application. They range from physics, to biology, sociology, and economics. Having worked your way through some or all of the examples of Chapter 1, you should be familiar with using the software and feel confident enough to apply the most important and fundamental ideas that let you create system dynamics models.
Apart from the diversity in application, the models represent different categories with respect to form, purpose, and complexity. Some of the physics examples have data which you can model in detail and determine system parameters by comparing simulations to reality. In two other cases—dealing with resources, economics and business—we have data of rather complex processes which would be too difficult to predict in detail. There, the purpose of the models is to find reasons for the underlying dynamics. In a couple of cases we do not have data at all beyond a qualitative knowledge of system behavior. Here, all we wish to accomplish is to learn to better understand the systems and system behavior by creating models that explain what is, or might be, going on.
The exercises also serve the purpose of exposing you to different ways of dealing with them. Some you should build yourself, and detailed guides to doing so have been provided. Others are discussed in a different form: you should investigate them and try to understand how I built them. Still other models mainly serve the purpose of a virtual lab: you should investigate complex system behavior.
 Download CBT_Chapter_2.pdf
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