Most producers and writers go through quite a few script edits. There's a lot of back and forth to make sure they get the message just right. They have client or director feedback to help give context on the proposed delivery. Edit some more and then the script is finally approved and everyone rejoices! Not quite...
Then there's the process of listening to voices that will best serve your project's needs. Once the voice over actor is selected, there are still a few more steps that need to happen prior to sending the script for the final read.
After 20 years in the business, I hope these tips provide guidance and understanding into our VO world.