Empathize
Observe and listen to see how users feel to understand their values & beliefs.
Define
Synthesize data and user quotes for patterns & connections to create a problem statement.
Ideate
Generate ideas, not evaluate ideas, and thus drive out obvious solutions by creating a large range of possibilities.
Prototype
Build with the users in mind and a specific question needing to be answered.
Test
Observe how users respond to a range of solutions, then use their insights to refine the problem and improve the solutions.