title: Systems are composed of a few classes of concepts.
Systems are composed of a few classes of concepts.
Elements: Literal parts of the system, including actors and intangible concepts.
Interconnections: The ways in which elements work together. While sometimes a physical flow, this can always be interpteted as a flow of information destined for a decision or action point.
Stocks: Measurable stores of physical or intangible stuff-of-concern. This is what constitutes the system’s goals’ foundation.
Flows: Activities that adjust the level of a stock.
Feedback loops: Reactions to changes in stock, which in turn changes inflow/outflow.