I am a nurse manager of a critical care area and I give experienced nurses starting new on our unit at least 4 weeks. we have computerized documentation and that takes at least a week or two to get used to, plus new docs and new policies and protocols. I meet with the new colleague at least every other week with the educator to determine how ready they will be when the 4 weeks are over. If they need more time, we extend. New GNs get at least 3-6 months. I would rather take the time in the beginning than backtrack when mistakes are made.