In particular, the Group ensures the planning, performance, control and improvement of maintenance processes on rolling stock through an organisation that provides for: › a unit that supervises and coordinates all stages of maintenance to ensure safe conditions for railway system vehicles; › a maintenance engineering unit that establishes the criteria and general provisions for the maintenance of vehicles, including the operating conditions for the functioning of vehicles and to learn from experience; › operating units that manage taking the vehicles out of service, sending them to repair workshops and subsequently returning them to operations; › maintenance systems at two organisational levels: the first level consists of the divisions’ current maintenance systems, responsible for light and corrective maintenance work included in vehicle shifts, while the second level consists of cyclical maintenance workshops responsible for work with a significant impact on the asset value of the rolling stock, which is carried out beyond the scope of the vehicle shifts.