Material does not support needs of readers. Organization Organization is the element of writing that deals with space and time. Other words that aid in defining organization are arrangement, flow, form, coherence, strategy, and order. Writing that has excellent organization has an effective purpose statement. Words used in broad context with style are word choice, mechanics, grammar, punctuation, editing, etc.
Style is also a matter of choice.
In other areas, such as word choice or sentence structure, the writer has more options. Writing that has excellent mechanics is proofread, polished, and attractive to meet expectations of situation and reader. Writing that has weak mechanics has unintentional framents or run-on sentences.