Stock is a table of digits. Size, index, brand and shelf location have to appear in seconds while somebody waits at the counter with a puncture.
The appointment depends on the ramp, not on the calendar. Two ramps and four fitters make a capacity the booking system has to know, or everybody arrives at once.
Storage is a separate warehouse with its own logic. Four tyres per customer, one rack space, a seasonal reminder and a fee: with no system, none of it is findable after three years.
The season doubles the work in six weeks. A shop with no booking and waiting list in October loses customers to the one next door at the same price.
Waste tyres are a traceability duty. Quantity, collection and the carrier's note get archived, because nobody asks until somebody asks.
The sale depends on linking it to the vehicle. Registration, model and the last size fitted turn a sale into a customer who returns in four years.