[vonmoltke]

The right combination of people doing the right combination of work. One of the ostensible purposes of open plans is to facilitate communication and collaboration. Unfortunately, every collaboration session throws off those around who are not involved.

[vollmond]

That's why I like open plan in small spaces -- IE, a conference room with 4-8 desks in it for a single agile team. All business-related conversations probably apply to all or most of the team anyway, and at least for a development team the phone chatter will probably be minimal. The walls keep you from distracting unrelated employees with your discussions, but the openness keeps the highly-relevant people in the loop.

[vonmoltke]

I have yet to see or work at a company organized like this. Usually it's dozens of people from multiple teams commingled in a single large room. Where I work now the entire company only has 8 people, but we have 5 different projects going on, of which I am only involved in 2.