I usually use outlines as a revision tool myself. I'll probably be making one that looks like a flowchart soon. I've had two betareaders get back to me on my latest WIR and apparently it lacks a strong sense of forward movement, particularly in the last third.

This has happened to me before. It's because the book's "problem" isn't one that has an obvious solution/end condition, so the reader doesn't know when the characters are making progress and when they aren't.

The last time it happened I went through the book asking, "Because this happened, what does my main character decide to do?". That gave me a flowchart of action -> result -> decision -> action. I could use as a revision guide, going through the book and making sure each connection on the chain was clear to the reader.

This time, although the problem sounds the same, I've got a very different kind of story on my hands. There is a lot of stuff that happens to my characters that comes from the outside pressures, rather than as a direct result of action that they take. So I'm thinking maybe the question I use as the focus of my flow chart needs to be different. Maybe "and what useful things did they learn from that?"