Thinking inSystems

A Primer

Stocks

The Foundation of Every System

A stock is the foundation of any system—an accumulation of material or information that has built up over time.

5
5
Simulation View
Stock: 50%

Feedback Loops

Feedback loops are the chains of causal connections from a stock through a set of decisions, rules, and actions back to the stock.

Phase Space+ Feedback

System Traps

Understanding these common system traps helps us avoid repeating the same mistakes.

Simulation: Active
// Leverage Point

Educate and exhort • Privatize or regulate the commons • Align individual with collective benefit

12 Leverage Points

These are places within a complex system where a small shift can produce big changes. Listed from least to most effective.

12

Constants and Parameters

11

Buffers

10

Stock-and-Flow Structures

09

Delays

08

Balancing Feedback Loops

07

Reinforcing Feedback Loops

06

Information Flows

05

Rules

04

Self-Organization

03

Goals

02

Paradigms

01

Transcending Paradigms

System Architect's Note

"Higher leverage points are more powerful but also more difficult to change."

The art of systems thinking is knowing where to intervene—and having the courage to intervene at the deepest levels.

DONELLA H. MEADOWS
THINKING
IN SYSTEMS
A PRIMER
Inflow to Knowledge Stock

System Resource

This book is the source code for understanding reality. Inject systems wisdom into your mental models.

INITIATE INFLOW
AVAILABLE
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SYSTEM VALUE
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Related Reading

1

The Fifth Discipline

Peter Senge

A practical guide to building learning organizations through systems thinking

2

Complexity: A Guided Tour

Melanie Mitchell

Explores emergence, self-organization, and complex adaptive systems

3

Limits to Growth

Donella Meadows et al.

Meadows' groundbreaking work applying systems thinking to global challenges

Thinking in Systems | Vibary