Drawing is often exploratory, with considerable emphasis on observation, problem-solving and composition.
It is one of the simplest and most efficient means of
communicating visual ideas.
A draft drawing is made in preparation for a planned final image. Studies can be used to determine the appearances of specific parts of the completed image, or for experimenting with the best approach for accomplishing the intended goal.
In my case to draw is an aid to visualize concepts for new sculptures.
Not all of my drawings achive this purpose.
Some of them are just sketches with an esthetic appeal of their own.