REPLY Stock and flow diagrams of Senge Archetypes (SD6087)

[Willem Geert Phaff h.w.g.phaff tudelft.nl]

Posted by  Willem Geert Phaff <h.w.g.phaff at tudelft.nl>
Hi Rod,

Since I'm doing some (not much :-) ) research on the archetypes and their 
behaviour, I'd be very much interested in an authoritative, rather minimal 
implementation of the archetypes.

By the way, the implementation of the "limits to growth" presented the most 
difficulties for me. The behaviour of the archetype can never be caused by an 
unforced first order differential equation, since it is non-monotone. 
Consequently, the limiting condition should be time dependent and would 
force the system behaviour. However, this would be a rather bad 
implementation, since in that case, an exogenous factor would determine 
system behaviour. Any thoughts on this?

Regards,

Willem Geert Phaff 
Posted by  Willem Geert Phaff <h.w.g.phaff at tudelft.nl>
posting date  Wed, 06 Dec 2006 19:11:42 +0100