The One Pager Logic Model is a simple, visual tool that helps you map the pathway from resources and activities to outcomes and long-term impact—all on a single page.
Also known as a Logic Model, Theory of Change, or IAOOI Model (Inputs → Activities → Outputs → Outcomes → Impact), it helps individuals and organisations understand how their work creates change and why it matters.
The one-page format makes it ideal for planning, communicating, and evaluating projects, programmes, initiatives, and strategies in a concise and accessible way.
How to use it
Define the Inputs (resources you need).
Identify the Activities (what you will do).
Describe the Outputs (what you will deliver).
Map the Outcomes (the changes you expect to see).
Define the longer-term Impact you want to contribute to.
Review the logic from left to right and ensure each step supports the next.
Workshop suggestion
Time: 30–60 minutes
Work individually or as a team.
Start with the desired impact and work backwards, or begin with available resources and work forwards.
Discuss assumptions, success factors, and gaps.
Refine the model until there is a clear pathway from action to impact.
Who is it for?
Social entrepreneurs
Non-profits and charities
Sustainability professionals
Impact-driven businesses
Community organisations
Educators and researchers
Government agencies
Consultants and facilitators
Anyone designing, planning, or evaluating a project or programme
What should you consider?
✓ Focus on the change you want to create, not just the activities you deliver.
✓ Distinguish clearly between outputs, outcomes, and impact.
✓ Ensure each step logically contributes to the next.
✓ Keep the model simple and easy to communicate.
✓ Review and update the model as your initiative evolves.
What’s the output?
✓ A one-page overview of your Theory of Change
✓ A clear pathway from resources to impact
✓ Shared understanding among stakeholders
✓ Defined outcomes and success indicators
✓ A foundation for planning, reporting, monitoring, and evaluation
✓ Greater clarity on how your work contributes to long-term change
The completed model can be used for project planning, impact measurement, funding applications, stakeholder communication, and strategic decision-making.
