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growth that exhibits behavior in the shape of the letter "s"

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1. growth that exhibits behavior in the shape of the letter "s". it expands rapidly at first, and then slows down as stock approaches its maximum value. S-shaped growth is caused by a shift in loop dominance from positive to negative feedback
2. behavior exhibited by a system that returns to its initial condition after being disturbed. in an unstable system, a disturbance is amplified, leading increased growth, or oscillation. a stable oscillation is one at constant amplitude, as in a clock pendulum
3. a behavior pattern that is repetitive with time and in which the behavior in one time period id of the same nature as any other period
4. visual diagram-based simulation software for system dynamics models. it is the education-geared version of the ithink software
5. an input (usually for testing purposes) that suddenly changes and then remains at the new value
6. an element of a system that is accumulating or draining over time. stocks are the memory of a system and are only affected by flows. also known as levels, they are signified by rectangles in system dynamics diagrams
7. diagram that gives an overview of the structural elements that produce system behavior by showing the stocks and flows. also known as flow diagrams
8. the building blocks and interval connections of a system. it is the way in which system elements are organized or interrelated
9. a collection of parts that interact to function as a whole. a system is almost always defined with respect to a specific purpose. systems often contain circular patterns of cause and effect called feedback loops
10. a field for understanding how things change through time. it deals with how the internal feedback loops within the structure of a system create behavior. computer simulation models are used to achieve better understanding of system behavior over time. with a better comprehension of systems, one can redesign structure or policies to improve the behavior. the field of system dynamics was created by Jay Forrester beginning in 1956