The industry convention for reporting performance across the franchise as a whole, and for comparing ScotRail’s performance with other train operating companies in England & Wales, is the Public-Performance-Measure, which measures arrivals against a five-minute benchmark. Performance for train services between the North-East and the Central Belt, and for train services between Aberdeen and Inverness, are at 86.0% and 88.8 %, respectively. 26 High-Speed-Trains (HSTs) will be introduced to run between Scotland’s seven cities from December 2018.