The Mythical (Open-Source) Man Month?

“It turns out that 10-12 developers on a project may well be the
optimal number for maximum efficiency and productiveness. No
surprise, then, that all open-source projects of which I’m aware
have 15 (or fewer) core developers. So why do we in the open-source
world often make so much of the ‘thousands of eyeballs?’

“Because open source is not about aggregating a community to
work on the code, but rather an array of communities to work on
code. Open source works, even when a project becomes big, by
staying small…”