First, Imagination is required;
Then Sketching is done using pencil, charcoal, chalk, digital pen or any other material;
Next is Refinement of the sketching to improve lines;
Inking or Painting ensures durability;
Finally, Colouring is the ultimate crown.
Honing art to just 5 steps sounds simplistic. The way these steps are orchestrated is where the level of that art is realised. I guess that's true of creativity across the board. Could a poor Lowry be viewed, just a kids lunchtime doodle? The steps of beauty really rest in the beholder's eye.