Reliability, availability and maintainability (RAM) are three parameters used for Spanish High Speed Lines (HSL) since almost 20 years when the Madrid Seville line was inaugurated (1992). Two years after the inauguration, one of the line’s trademarks was introduced: the punctuality commitment. If trains arrive more than 5 minutes late to their destination, passengers get a full refund for their tickets. This article intends to take a tour along the 20 years of the Spanish HSL by focusing on the management of the RAM parameters by the Spanish Infrastructure Manager (IM).