What breaks when the team grows
Nothing about a small team scales. It just stops working one person at a time, and by the time you notice, the fix is a reorganisation.
A team of four needs almost no structure, and adding it early feels like bureaucracy. A team of twelve needs it badly, and by then adding it feels like an accusation. The trick is knowing which specific things break, and roughly when.
Everybody knowing everything stops around six
At four people, context spreads by itself: you overhear things, you were in the room. Somewhere around six that stops being true, and the failure is invisible because nobody experiences not hearing something.
The first thing to change is where decisions get written down. Not more meetings — a decision anyone can read afterwards. If the answer to "why do we do it this way" is a person rather than a place, you have already outgrown that arrangement.
One channel for everything stops around eight
A single place to talk is a genuine advantage while it lasts. It ends when people start skimming, which happens the week the volume passes what someone can read over lunch.
Split by topic, not by seniority, and keep the number small — three or four channels people actually read beats eleven that everyone mutes. Resist a channel per project until a project genuinely has its own ongoing conversation; an empty channel teaches people that channels are optional.
Everyone in every meeting stops immediately
This one breaks first and is defended longest, because inclusion feels like respect. But a meeting of eleven where three people talk is not inclusive; it is eight people doing nothing expensively, and they know it.
Invite the people who will speak or decide. Write down what came out of it for everyone else — a written outcome respects people's time more than a seat they did not need.
Give every recurring thing a name
In a small team, "someone will do it" works because there are four candidates and everyone can see the gap. At twelve, it produces the invoice nobody sent and the update nobody posted, and every single time the honest answer is that everybody assumed.
Every recurring responsibility gets one person's name, said out loud, written where new people can find it. Not a committee, not a rota unless the rota is written — one name, changed openly when it needs to change.
Questions people actually ask
When does informal communication stop working?
Around six people. Context stops spreading by itself, and the failure is invisible because nobody experiences not hearing something. Start writing decisions somewhere readable before that point.
How many channels should a growing team have?
Three or four that people actually read, split by topic rather than seniority. Avoid a channel per project until the project genuinely has its own ongoing conversation — empty channels teach people channels are optional.
Should everyone attend every meeting?
No, and this breaks first. A meeting of eleven where three talk is eight people doing nothing expensively. Invite whoever will speak or decide, and write the outcome for everyone else.
