Teams that don’t use pairing or mobbing should have 3–5 programmers. As they grow larger, they’ll start to have trouble coordinating. Teams that pair program should have 4–10 programmers. Six is the sweet spot. Teams new to Delivering practices should avoid growing past 6–7 programmers until they have more experience. Teams that mob program should have 3–5 programmers. You can mob with much larger groups—it’s a great teaching technique—but you reach a point of diminishing returns.
