What does it mean?
The Design Council’s Double Diamond separates discovery and definition of a problem from exploring and delivering responses. Both phases make space for divergent and convergent thinking.
Make it concrete.
Illustrative example: A shopping app team wants to redesign checkout because customers keep leaving. Before changing the screens, they interview customers and discover that unexpected delivery fees—not the layout—are causing people to leave.
A common mistake.
Treating the model as four rigid steps that never overlap.
When should you use it?
When a team is jumping into solutions before agreeing on the actual problem.
Explore the source.
Design Council — Framework for Innovation ↗This is a reference for further learning, not an endorsement or a verbatim quotation.