Writing is a process that never seems to end. There's the initial writing where I figure things out but it's just a fuzzy glorified outline. Secondary writing comes next and then it can be called a first draft. After finishing the book it gets revised a second time. A few days later a third time. Only then does someone else read it and when they're finished I incorporate their critique. Any time a new scene is added or a scene rewritten the process starts over. I may feel inspired at random times to revise in addition to the above. At times I want to pull my hair out, but I want it to be the best it can be. There's a story that illustrates my point. I read it somewhere but I forget where. I'll update this post when I find the source.
A writer made a manuscript and thought it was pretty good so he sent it to publisher. The publisher replied with a note, "Is that the best you can do?" So the writer looked it over again, revised it, and sent it a second time. "Is that the best you can do?" So the writer revised again and sent it a third time. "Is that the best you can do?" The writer finally said, "Damn it! Yes it is!" The publisher said one more thing, "Then I guess I'll read it this time." No one wants less than your best.