Behavioural Change Toolkit · Diagnose

Behavioural Diagnosis Canvas — Interactive

You want to work the canvas through on screen and get a prioritised set of next steps, a Word document and an Obsidian note out of the other end

Work through the Behavioural Diagnosis Canvas on screen. When you generate the diagnosis it reads your COM-B scores, names your primary barrier, and tells you which kinds of intervention can actually work against it — then gives you an ordered set of next steps into the rest of the toolkit.

Everything stays in your browser. Nothing is uploaded, and your answers are saved to this device as you type.

Saves to this device as you type

1 · The change, in one sentence

2 · What does success actually look like?

Not the milestone. What is observably different on an ordinary Tuesday? Six months from now, if this has worked, someone walking the floor would see:

3 · Who has to do something differently?

Include leaders as a group. They almost always have to change too, and it is almost always left off this table.

GroupRoughly how manyWhat they do nowWhat they must do insteadPriority

4 · The vital few behaviours

Maximum five. Ruthlessly. Each must pass the film test: could you film someone doing it and know whether they did it?

BehaviourWhoWhen / triggerCurrently happening?

5 · COM-B barrier scan

For your top behaviour. Score each 1 (total blocker) to 5 (no issue). The lowest score is your primary barrier and drives everything below — see COM-B and the Behaviour Change Wheel.

ComponentScoreEvidence — how do I actually know?
Physical Capability
Psychological Capability
Physical Opportunity
Social Opportunity
Reflective Motivation
Automatic Motivation

The evidence column is the point. If your evidence is “we assume” or “the steering group thinks”, you have an opinion, not a diagnosis — and the generated plan will tell you so.

6 · Bright spots

Where is this behaviour already happening, even partially? Who, and what is different about their situation?

7 · What is genuinely in it for them?

8 · The honest risks

RiskLikelihoodImpactWhat I would do

9 · What I do not know yet

Bring this section to your sponsor. Naming your uncertainties builds far more credibility than a confident plan built on assumptions.


→ Next: Target Behaviour Definition · Barrier Analysis — COM-B Interview Guide · Change on a Page

← Back to the Behavioural Change Toolkit

Last updated: 11 August 2026