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Jay Forrest wrote: > From a purely SD perspective we would propose that the "effectiveness >of a leverage point" should be essentially the derivative of > system behavior with respect to the change in the element under >consideration. More effective leverage points would have more impact. ...

Donella Meadows wrote: > Id like to try to open nontechnical minds to the kinds of interventions we > see when we look from the point of view of whole systems. and added a list of 12 places to intervene in a system. My immediate reaction: Intervention by whom? Us as consultants/teachers/modellers? O...

* George Richardson wrote * I am becoming increasingly alarmed at messages to this list from people * doing graduate work in system dynamics who do not appear to have had * course work in the field or knowledge of system dynamics literature. = Population---> SD aware---> SD student---> SD novice--->...

I followed the replies to Fabian Szulanskis request to brainstorm a = definition of System Dynamics with great interest.=20 I offer the following observations: * Its a pity to focus on the elevator or 30 seconds; The discussion = itself clearly indicates the need to define what is being practiced (o...