It's Freytag's Pyramid. You know old Fry, right? No? I'm sure a lot of people are familiar with it from writing courses or school.
Take a look at your novel and see if it follows this structure. I would think that, even if you've never heard of it, your novel can't help but follow this pattern. If you're a reader, and I certainly know you are, it's instinctual to follow this structure when attempting to write a book. (Even if you didn't know you were.)
So, how about you? Are you adhering to the doctrine of Herr Freytag?