One damaged car, and tomorrow's bookings are wrong

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A customer returns a car with a wrecked bumper. The invoice is the easy part. What about next week's bookings?

Start from the quote's lines. Late fee: after one grace hour, a quarter of the day rate per hour. Then a damage fee, from a table. Minor, or major. Each one is one more labelled line on the invoice. Nothing is hidden.

Before the return, two economy cars at the branch. Both can be promised. Major damage: the car goes to the workshop. A car in the workshop is not in the fleet. Now one.

A range that fit yesterday is refused today. Same request, same dates. The peak test has one less car to offer. Eve fits. Fay does not. Existing bookings may now overbook the branch. That is why real systems have upgrade rules.

A damaged car leaves the fleet. Availability must know.

Full breakdown in the lecture.