Mechanics of Stocks and Flows *

1) Create a stock/level accumulation

2) Add a flow/rate

Constant rate
Constant rate with connectors
Rate with feedback

Rate with feedback and policy variable

3) Add an outflow

With connectors and simple function

Would there be any difference in the tabular output of the people stock in the following stock and flow diagrams A,B?


* Note: the symbols and equation design contained in this document were created using ithinkTM from High Performing Systems.
(c) 1999 John H. Saunders