People who want more structure in the early stages or are linear thinkers might not like this process. It works for me, and the end result is what counts, after all, otherwise the processes used have not met their goals.
Once I freed myself up from having to do linear thinking in the early stages of writing, my writing took off. I am not a natural linear thinker, and my strength is finding connections in ideas and concepts that might be missed in a straight linear analysis. Constructivist are us.
This brings some interesting results in when I write, and think, esp. because I am in an academic field ( law) that is known for its linear analytical processes.