Complexity and uncertainty

The terrain where traditional planning breaks down and different approaches are needed.

There’s a crucial difference that most organisations miss: the difference between complicated and complex. A jet engine is complicated - many parts, but ultimately predictable and designable. A community, a market, or a team under pressure is complex - unpredictable, emergent, and constantly adapting.

The tools that work brilliantly for complicated problems (analysis, planning, expertise) actively mislead you in complex ones. Complex systems need experimentation, adaptation, and a tolerance for not knowing the answer in advance.

This theme covers the concepts that help you tell the difference and respond appropriately. When to analyse and when to probe. When to plan and when to experiment. When to seek expertise and when to seek diversity.

10 concepts

When two or more systems evolve in response to each other, neither standing still

Complex Adaptive Systems

Systems made of many agents that learn, adapt, and produce behaviour nobody designed

Complexity vs Complication

A jet engine is complicated - predictable if you understand it. Raising a child is complex - fundamentally unpredictable

Cynefin Framework

A sense-making model that matches your response to the kind of situation you're in

The zone between rigid order and total disorder where systems are most creative and adaptive

Some systems can only be understood by running them - there's no shortcut to the answer

Self-Organisation

Order that arises from interactions, not instructions - nobody planned it but it works

Sensitivity to Initial Conditions

Tiny differences at the start can produce vastly different outcomes - and you can't always tell which ones matter

Uncertainty vs Risk

Risk is when you know the odds. Uncertainty is when you don't even know what could happen

Wicked Problems

Problems that resist definition, change shape when you try to solve them, and have no stopping rule