In a post on OpenCulture's website, their article "How J. K. Rowling Plotted Harry Potter with a Hand-Drawn Spreadsheet," we learn that Rowling used this chart to map the action for Chapters 13 - 24 in Phoenix. (More happened in these chapters than you remember, huh?!) Some of the notes in the spreadsheet refer to these things:
Want to know more about Rowling's approach to writing Phoenix or how she outlines her books? CLICK HERE to check out this blog post from Endpaper to learn more.