The urge to write springs from some personal interest one wants to share. It could be an emotion, an experience, or a point of view on a particular subject matter. Once inspiration strikes, however, there is the compelling desire to find a way to communicate what one has in mind. Another thing usually happens along the way. One creative thought leads to another, and the scope of what one wishes to communicate grows from a single item into a collection of items.
Action suggests dialogue which defines a character who goes into action, and on and on.
Ultimately, an author finds himself with a bag of interesting dramatic elements, each of which is intriguing, but not all of which are connected. It is at this point an author's mind shifts gears and looks at the emerging work as an analyst rather than as a creator. The author as analyst examines what he has so far. Intuitively he can sense that some sort of structure is developing. An author may find that the points of view expressed by certain characters are unopposed in the story, making the author's point of view seem heavy-handed and biased.