As Fred Brooks pointed out in The Mythical Man-Month, adding people to a project tends to slow it down. The number of possible connections between developers grows exponentially with the size of the group.8 The larger the group, the more time they’ll spend in meetings negotiating how their software will work together, and the more bugs they’ll get from unforeseen interactions. Fortunately, this process also works in reverse: as groups get smaller, software development gets exponentially more efficient.
