Positive feedback
a loop with causalities with 1)positive feedbacks or 2)even nb of negative feedbacks
Negative feedback
a look with causalities with uneven nb of negative feedbacks
what is a Causal Loop Diagram? what is its purpose ?
1)depict casual relation in (between?) systems
2)reveal feedback in systems
3)communicate complex structures
4)drawn before model implementation
5)derived from a stock and flow model
=>labeled + or -