Storyboard from Uri Schulevitz p70
Just on the off chance that someone has yet to read/look at this section...
With these very simple sketches, the content and compositions take shape and reveal the cohesive flow of the story. By keeping it loose to this point, revisions are still easy to determine, and make.
This is where your story either is, OR you've progressed to the second stage- a more refined storyboard with more accurate text areas allotted.