Reinforcing Loop
Updated 2026-08-05
INTRODUCTION
English translation pending.
CORE DEFINITION
One of the two fundamental loop types in system dynamics. In a reinforcing loop, a change in one variable propagates around the cycle so that it increases itself, generating exponential rather than linear behavior until a balancing loop intervenes or a limit is reached. The core claim is that compounding behavior comes from loop structure rather than from the size of the initial push. The qualification is that reinforcing loops always operate in a context containing limiting factors, so unbounded growth is temporary.
SCAFFOLDING EFFECT
Reduce cognitive load
- Use Chain Search: Look for the more-of-this-produces-more-of-that chain in the system. - Use Direction Check: Decide whether the loop compounds something you want or something harmful. - Use Damping Design: Add a brake or break point to a vicious loop rather than pushing the opposite way.
Anchor fast decisions
When a variable feeds back into its own cause, each increment produces a further increment, so growth compounds rather than accumulating linearly. The same structure running in reverse produces accelerating decline, which is why the loop type matters more than the sign of the initial change. Because no resource is unlimited, the exponential phase is eventually capped by a balancing loop, and the transition between them often appears sudden.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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