Keeping an open office quiet is certainly helpful, but for some people it's visibility rather than noise that's the biggest impediment to concentration. If you

Keeping an open office quiet is certainly helpful, but for some people it's visibility rather than noise that's the biggest impediment to concentration. If you have to do it then maximizing the number of "back to a wall" desks and ensuring that there are reasonable partitions if you've got back-to-back workstations helps somewhat, but it's never going to be a friendly environment for those who don't like to be overlooked while concentrating.