The team that only exists in someone's head

The most valuable thing a small team owns is not in any of its accounts, and it is the one thing nobody is responsible for maintaining. It is what everybody knows. Not what is written down, what is known: why that client must never be rung before eleven, which supplier will quietly fix a mistake if you ask nicely and which will charge you for breathing, the reason the thing was built the odd way it was built, the fact that the odd way is load bearing and the tidy looking alternative broke everything the last time somebody tried it. On a small crew all of this lives in people's heads, and it lives there very efficiently, right up until the head goes on holiday, or takes a better offer, or is simply off sick on the one day the thing goes wrong, and then you discover, all at once and expensively, how much of your business was being run out of a single memory that has left the building.

I used to think writing things down was bureaucracy, the sort of thing big slow places do instead of working, and on a small team every hour spent documenting is an hour not spent shipping, so it always loses the argument in the moment. It loses the argument every single time, which is exactly why teams stay undocumented, because the cost of not writing it down never arrives on the day you did not write it down. It arrives months later wearing a different face, disguised as a crisis, and by then nobody connects the panic to the note that was never made. That is the whole trap. The saving is immediate and visible and the bill is delayed and unattributed, and human beings are famously poor at pricing that particular shape of bargain.

So I have made my peace with a small, dull discipline. When somebody solves a problem that took real thinking, I ask them to spend ten minutes writing down not the answer but the reasoning, the why, because the answer will be out of date by spring and the reasoning almost never is. When a decision is made in a meeting, one line goes somewhere findable: what we chose, and the thing we were worried about when we chose it, because the second half is what saves the next person from cheerfully reopening a door you closed for a good reason. None of this is a system, and I distrust anyone selling you a system for it. It is just the habit of leaving a trail, so that the person who comes after you, who is quite often a tired version of you in eighteen months, is not forced to rediscover from scratch what the team already paid to learn once. A business that only exists in the founders' heads is not a business yet. It is a very impressive performance that ends the moment the performers do, and the whole point of building something, as opposed to merely doing something, is that it should be able to survive you having a day off.