Railway traffic has increased over the last decade and it is believed to increase further with the movement of transportation from road to rail, due to the increasing energy costs and the demand to reduce emissions. Efficient and effective maintenance is required in order to assure maximum dependability and capacity of the existing railway infrastructure. To manage maintenance successfully within the scope and set objectives, the effect of maintenance activities must be measured and monitored. Performance indicators (PIs) for reliability, capacity, punctuality, etc., are extensively used by infrastructure managers (IMs) in decisions making. However, they are often ad-hoc and seldom standardised. Performance measurements can give large savin...