Optimal size of team in one room is about 2 - 3 members. Any outside disturbance is likely to affect all team members.

Trying to explain this to management can be very frustrating because they don't understand that coding is a focus intense task. And it does not matter if you cite research. Coincidentally, management usually have their own rooms.

Some links in Swedish with Google Translate

Worse working environment in open office landscape (2014) https://translate.google.com/translate?hl=en&sl=auto&tl=en&u...

Opening office landscapes causes stress (2015) https://translate.google.com/translate?hl=en&sl=auto&tl=en&u...

Open office gives higher sick leave (2008) https://translate.google.com/translate?hl=en&sl=auto&tl=en&u...

Opening office landscapes leads to overtime (2014) https://translate.google.com/translate?hl=en&sl=auto&tl=en&u...