fragile teams

An important property of teams is that they abstract the complexities of the individuals that compose them. Teams with fewer than four individuals are a sufficiently leaky abstraction that they function indistinguishably from individuals. To reason about a small team’s delivery, you’ll have to know about each on-call shift, vacation, and interruption.

They are also fragile, with one departure easily moving them from innovation back into toiling to maintain technical debt.

Will Larson, from An Elegant Puzzle: Systems of Engineering Management