Novels
I've never been asked for a rewrite or a revision on an accepted novel. But I don't usually write the novel until after it's been accepted. First I write a synopsis, and the editor reads it. It's at this point that I might be asked for changes. I usually agree. Then I receive a contract and write the novel.
The funny thing is, the novel I write is usually not much at all like the one I describe in the synopsis. Sometimes nothing like it. Doesn't matter, I guess, as long as the editor likes it.
The editing process is usually an editor saying "I think we can do without this scene," or "We need to shorten this scene a bit." This is all done with internal editing, margin notes, and flags. I go thorugh the copy edited manuscript and see which changes, cutting and tightening, I like, which I don't, and that's that.
The first time I saw a copyedited manuscript it scared me to death. There were marks on nearly every page, plus margin notes, plus about seventy flags. Then I realized that almost nothing had been changed. Nearly all the margin notes and flags were questions about my research, asking where I found this information, how did I know this happened when it did, or that happened where it did.
Most of the margin notes dealt with dialogue. I still remember one. The dialogue used the phrase "born and bred," and the editor wanted to know if this was an actual phrase, and would the character use it.
As I said in another post, I have had to go through and change a character's hair and eye color. But I don't think this qualifies as a rewrite or a revision.
It's a matter of editors trying to place the final polish on the manuscript, but I've never been told I needed to rewrite or revise.
It helps being able to get a contract before you actually write the novel, but either way, I believe the less you give an editor to do, the better your chances of selling a novel. I think it's human nature. An editor can read a novel and think, "There's some good stuff here, but it's going to take a LOT of work to get it ready," or an editor can read a novel and think, "I can get this ready on a busy afternoon."
Right now, I'm in the opposite position. I have to finish two novels before I get a contract because of writing for a new publisher in a new genre, and it will be interesting to see how this goes. I may be asked to rewrite and revise ten times.