Nobody here learned this from a poster on a wall.
It started in a rented kitchen with one oven that ran hot on the left side. We burned a lot of croissants. Our neighbours ate most of them anyway and told us the truth, which is how we got better.
Eight years on, the oven is newer but the routine is the same. Butter comes in on Monday and Thursday. The dough rests for two nights. Someone tastes the first tray at six and says “again” more often than you’d think.
We make less than we could sell. That’s on purpose.