I recently told scheduling 10 hours behind the door and heads exploded. 8 sleep opp, plus food, plus getting ready in the am. Then I added :45 for travel each way and the total was 11:30. They fought me on it when I said no :30 minute push. I showed exactly when I said I would and we were 20 minutes late. So from my experience 12 hours release to scheduled push is about right.