Chapter 7
Causal Loop Diagrams
System dynamics helps us to analyze complex systems with special emphasis on the role of
information feedback. This chapter describes causal loop diagrams, a technique
Chapter 14
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The Tucannon Salmon
System dynamics can be used to help policy makers and environmental managers improve
their instinctive understanding of dynamic behavior. This chapter illustrates how
Chapter 19
Volatility in Aluminum Production
Aluminum smelting is a commodity industry with highly volatile prices. This chapter uses
system dynamics to look inside the industry to help us understan
Chapter 18
m
Predator-Prey Oscillations on the
Kaibab Plateau
The relationship between predators and their prey has always occupied a special place in the
minds of ecologists. There has probably been
PART 111
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THE MODELING PROCESS Chapter 15
The Steps of Modeling
Building a model is an iterative, trial-and-error process. A model is usually built up in steps
of increasing complexity until it is
Chapter I 1
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The Numerical Step Size
Chapter 3 explained the numerical approach used to generate the simulation results in system
dynamics models. You learned that the calculations are repeated over
Chapter 8
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Causal Loops and Homeostasis
Homeostasis refers to our remarkable capability to maintain a relatively stable physiological
state even when the outside environment is varying dramatically.
Chapter 9
Bull -Eye Diagrams
The structure of system dynamics models may be explained with stockandflow diagrams,
equilibrium diagrams, or causal loop diagrams. The best way to describe a model is w
PART I
m
INTRODUCTION Chapter I
m
Overview
A model is a substitute for a real system. Models are used when it is easier to work with a sub-
stitute than with the actual system. An architects blueprint
1 Chapter 6
S-Shaped Growth
Sshaped growth refers to a general pattern of growth that has been observed in a wide vari
ety of systems. Examples include the growth in certain animal populations (Rick
Chapter 5
Equilibrium Diagrams
System dynamics is the study of how systems change over time. Our focus is on dynamics,
but dynamics are often difcult to understand. In watching students and professi
Chapter 2
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Stocks and Flows
Stocks and flows are the building blocks of system dynamics models. A simple, everyday illus
tration of stocks and ows is the accumulation of interest in a bank account. F