The 1st step, Emphasize, is to make research for persuading people by their needs
The 2nd phase, Define, is to process the information, check the observations and use them to fix their core problems
The 3rd phase, Ideate, is to think of alternative ways to think of the problem and identify some creative ideas to fix their problem
The 4th phase, The Prototype, is the testing phase, where they use prototypes to improve from the previous prototype to make the final type.
The 5th and final phase, The Test is where they test each prototype with people for comments for improvement and what is great, so that they can make the next prototype or the final.