Where it usually starts
A barbershop sells short, fixed-length cuts at high volume, and most of the trade still walks through the door.
- The usual set-up is a booking app for the few clients who plan ahead, a queue that lives in the barbers' heads, and a shout of "who's next?" when a chair empties.
- On a Saturday morning that breaks down fast.
- A walk-in is told twenty minutes and waits fifty because two booked clients arrived in the meantime and nobody was counting.
- Another walk-in leaves for the shop down the road because there is no way to see the wait before coming in.