The biggest factor has been our focus on resilience and Aircraft Availability. Our fleet continues to grow and today we support more than 8,100 engines across multiple engine families. To meet customer expectations, we have looked closely at every aspect of our service operations and with consultation with our customers, invested where it makes the greatest difference.
That includes adding dedicated Business Aviation personnel across On-Wing Services, MRO and support functions, expanding our lease engine fleet, investing in training and knowledge-sharing programmes and continuing to strengthen our global Authorized Service Centre network while also investing in Digital and AI toolsets.
Most importantly, we have continued to invest heavily in our global services capability. In total, Rolls-Royce has invested more than $1 billion into its service network, creating one of the most comprehensive - if not the most comprehensive - support infrastructures in business aviation.