This is all about generating ideas to solve the problem. It includes lots of techniques to help get things started.
Step 3.
This is about bringing ideas to life and creating a prototype. The emphasis is on rough and ready. No design skills required.
Step 4.
All things testing. How, where and with whom? Along with the best ways to capture feedback.
Step 5.
Making sense of feedback and coming to a conclusion or recommendation. The So What?