Review: Places to Intervene in a System
FRAME: Leverage Points to Provoke Change in Complex Systems

Places to Intervene in a System (In Increasing Order of Effectiveness)
by Donella H. Meadows

Review by Bryan Coffman

First we need to understand a few concepts about how a system works. All systems and their components have system "states,"which refers to the amount of something (physical or non-material) that’s on hand—like items a store might keep in stock for sale. One state of a bathtub might be the amount of water in it. Another state might be the temperature of the water.

Table of Contents

Introduction
The Components of the Model
Numbers
Stocks and Flows
Regulating Negative Feedback Loops
Driving Positive Feedback Loops
Information Flows
The Rules of the System
The Power of Self-Organization
The Goals of the System
The Mindset or Paradigm