A 10-person firm: sales grow, we hire the 11th. Everything works. The team knows each other well, communication is direct, everyone knows what the rest is doing.
A 25-person firm: departments form. Sales, service, back office. Each department has a lead. It works, but with friction – first situations where the left hand doesn't know what the right is doing.
A 50-person firm: we introduce processes "because we have to". Coordination meetings, reports, status updates. Most of the board's time goes to team management, not company growth. Every second decision needs consultation with two or three people.
An 80-person firm: 30% of team capacity goes to internal coordination. A new customer costs the firm more than a year ago, even though we technically have "scale". Unit margin drops despite revenue growth.
A 150-person firm: full corporate structure, decisions take weeks, customers wait, the competitor serves them in hours. Revenue grows, but every additional euro of revenue costs 2x the engagement it cost at 50 people. That is the classic model's ceiling.