My process is to write everyday but edit yesterday's work to get me back into the groove before moving forward. By the time I am done with my rough draft I have edited at least twice.
My next process is to read through the manuscript, looking for holes in the plot, major changes, flaws, better explanations, maybe cutting back on too much description, etc. I find there are things I might need to rearrange.
When this is done, I'll go through it line by line polishing things up about 2-3 times. Line editing may turn into some rewrites here and there. I tend to cut back and take things out more than I add. I'll find places where i duplicate. For instance, I may say:
John grew angry with the latest news. "Dammit. That son-of-a-b*tch."
"Calm down," Frank said, trying to prevent John from coming unglued.
Then I can do this:
grew angry with the latest news
yelled, "Dammit. That son-of-a-b*tch."
"Calm down," Frank said.
trying to prevent John from coming unglued.
To get me:
John yelled, "Dammit. That son-of-a-b*tch."
"Calm down," Frank said.
For me most of my edits are to reduce unnecessary clutter and repetition prior to outside editors. I cut my 2nd book 4,000 words between the rough draft and final copy. I'll cut full paragraphs sometimes if I think it may not fit.
Then I send my manuscript to an editor who goes through it line by line. As a first time reader they will open your eyes to things you may oversee. Things they will pickup on are pronoun usage. As a writer you know who is doing what but as a first time reader it may not be so clear, so you may need to make sure it's absolutely clear who, or what, is doing the action. Every single line needs to make sense and move the story along. They'll pick up on typos. For instance. I read through my manuscript 5 times and still didn't pick up on the fact that someone was trying to get "cell surface" and not "cell service". Someone also was trying to "Peer through the think bushes" and not "thick bushes." We tend to read what we know it's supposed to say. I even had written that there was a "cold due blanketing the ground" and not "dew".
Although consciously we know how to spell, there are things the writer will simply oversee.
My editor will offer suggestions, line by line. I can either accept or decline. Maybe they'll say things like "You don't need to mention this here, because you already did in the previous chapter."
Once I make the changes I wish to make, I resend it and then they go through it one more time. Picking up on typos, seeing if the changes worked well, and if they may have missed anything else.
Once this is done and I make changes, I thank them and then sit down and read through it a last time. Then I'm done.