- Rules for intervening in a system :
:http://www.wikipedia.org/wiki/DonellaMeadows%27twelveleveragepointstointerveneina_system
See also OnSystems, SystemsThinking
:http://www.wikipedia.org/wiki/DonellaMeadows%27twelveleveragepointstointerveneina_system
See also OnSystems, SystemsThinking