재고 및 흐름 다이어그램 템플릿

시각적 패러다임 별 재고 및 흐름 다이어그램 템플릿

Stocks and flows are the basic building blocks of system dynamics models. Jay Forrester originally referred to them as "levels" (for stocks) and "rates" (for flows). A stock variable is measured at one specific time and represents a quantity existing at that point in time (say, December 31, 2004), which may have accumulated in the past. A flow variable is measured over an interval of time. Therefore a flow would be measured per unit of time (say a year).

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