Design process is complicated and highly subjective, dependent upon the designer.
It is a struggling search for the unknown, for if one knows what one is looking for, the search will be a struggle and there will be an end to it.
There is no end in design, no answer, no destination. It is a ride one should take, not knowing from where one should start.
Design process is complicated. I often think of it like composing a piece of music.
Some are gifted, they design effortlessly. Mozart
Some are experienced, they design effortlessly as they practice and grow. Bach
Some are persistent, they design and redesign in search of perfection. Beethoven.
In one time or another, I believe one must been through at least one way of the design process.