Below are many faces of the drawing and design process.
I will show you how go from the vision in your mind to a finished drawing. This is the basic drawing and design process. You first formulate an idea, then generate thumbnail sketches. The best of those become more realized drawings. Finally from those revised drawings your original vision is brought to life in a finished complete masterwork.
The idea or sketching process.
Pencil studies of Lulu leading to studies with paint.