Make sure your nanny keeps a log of feeding, sleeping, #2. What time the food was given, what was given, how much the baby ate, when was the baby put down for nap,how long the nap, did he/she go #2. It's not complicated, I went back to work when my kids were 18 months old, our nanny filled the log sheet everyday without any problem. It was just a better way to communicate and give me a snapshot of the day. No, our nanny never missed to fill the sheet, it takes 2-3 minutes. There are standard templates available if high google. Also, keep in mind performance must be managed, nothing happens on autopilot.