Decision Architecture

A positional model for understanding which organisational changes are actually possible.

Most organisational change fails.

Not because of effort, intelligence or intent, but because the system does not permit effective action.

This book introduces the concept of the move space.

In any organisation, there exists a constrained set of possible actions.
Some improve the system.
Some degrade it.
Many appear effective but change nothing.

You cannot optimise inside a broken move space.

The problem is not choosing better actions.
The problem is understanding which actions are structurally valid.

This is not a framework.
It does not prescribe best practices.

Instead, it provides a positional model for organisational systems:

- structure defines what is possible
- signals reveal how the system behaves
- moves define the set of valid interventions

Across domains such as decision authority, coordination, incentives and information flow, this book maps:

- terrible moves that embed failure
- bad moves that degrade the system
- neutral moves that change nothing
- good moves that improve structure
- great moves that remove entire classes of problems

Most organisations manage outcomes while preserving the constraints that produce them.

This is a system for reasoning, not imitation.

It is intended for engineers, technical leaders and system thinkers who want to understand why organisations behave the way they do and how to change them structurally.