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A Stock Carries the System's Memory and Cannot Jump to a New Value

Rests on stk-bathtub-accumulation and supports stk-buffer-absorbs-shocks and stk-pipeline-delay-in-transit. It supplies the physical reason a delay exists at all, which lop- then puts inside a loop to get overshoot, and which lev- uses for intervention timing. Stops at the line: the oscillation that follows when the delay sits in a loop is lop-'s claim, not this one.

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Graphical Integration of Stocks and Flows in System Dynamics

In system dynamics, a stock's value over time is the accumulation (integral) of its net flow rate, so the change in stock between two time points equals the area under the flow-rate curve over that i…