Six chairs, ten hours, nothing carries over

The most perishable inventory there is

Six chairs at ten hours is sixty chair-hours a day. That is the entire stock, it is produced fresh each morning, and any of it unsold at closing is gone permanently.

Salons understand this about Saturdays, where the constraint is obvious. Very few act on Tuesdays, where the same inventory is going unsold quietly and the shop is not full enough for anyone to feel the loss.

The question a paper book cannot answer

A diary handles today perfectly well. Turn to any date and it tells you who is coming and when.

What it cannot do, in any practical amount of time, is tell you who used to come every six weeks and has not been in since March. That customer did not complain and did not cancel. They simply stopped, and a salon running on paper finds out never.

This is the single highest-value thing in a salon's data, and it is the thing paper structurally cannot give you.

Use real durations, not the price list

The price list says a cut is thirty minutes. Watch the floor for a fortnight and it is thirty-eight, including the conversation, the wash and the sweep between clients.

A schedule built on the price list accepts bookings the salon cannot physically serve, and recovers by running late all day. Every client after eleven o'clock waits, and the stylists blame the system rather than the durations.

On no-shows

Reminders reduce them. They do not eliminate them, and any salon planning on the assumption they will is going to be let down.

One thing that reliably works better than expected: making cancellation easy. A large share of no-shows are people who meant to cancel and found it awkward to ring. Give them a way to do it in one tap and a chunk of dead slots become recoverable ones with a few hours' notice.