It also reserves the airline a place in the manufacturing queue, so that when the airline finally exercises its options, it can place its order without having to join the beginning of the queue which may delay the delivery of the aircraft for years.
It also reserves the airline a place in the manufacturing queue, for a guaranteed delivery slot. When the airline finally exercises its options, it can place its order without having to join the beginning of the queue which otherwise may delay the delivery of the aircraft for years.