The design process
A common way to split up the design process is:
Generating wild ideas, emphasis on creativity, brainstorm. Exploring unsuspected possibilities
Translating ideas into designs, filtering on practicality. Resulting in a few possible designs. Sketchy.
Working out the chosen direction. Resulting in a very tangible product design
Complete and accurate detailing of the entire design. Solving any and all technical and production issues.
Testing all the production equipment. Sorting out any issues that may arise.