The true mean of art is said that u cannot plan art out but it must flow then it must come from within.I like to plan it out when doing a class project, yet rarely plan it out when I'm making art just for me. If there is no plan then there is not structure to a piece. Also the plan can always change u dont have to stick to it like if it were written in black and white a plan on artwork is just a guideline. Some artwork does not need planning yet that is the exception by a piece can hold its own with a structure.