Delivering punctuality and reliability is our commitment to the passenger
It’s important to us to get this right, and to be able to account for how we’re doing to our customers, and our regulators.
Public performance measure
The public performance measure (PPM) combines figures for punctuality and reliability into a single performance measure. It is the industry standard, measuring the performance of individual trains advertised as passenger services against their planned timetable as agreed between the operator and Network Rail at 22:00 the night before.
PPM is therefore the percentage of trains which arrive at their terminating station ‘on time’ compared to the total number of trains planned. A train is defined as on time if it arrives at the destination within five minutes (ie 4 minutes 59 seconds or less) of the planned arrival time for London and South East or regional services, or 10 minutes (ie 9 minutes 59 seconds or less) for long distance services.
Where a train fails to run its entire planned route calling at all timetabled stations it will count as a PPM failure.
As the name suggests, network availability is about keeping the railway open when required by passengers and freight customers.
Network availability performance is measured using the Possession Disruption Index (PDI), an indicator developed with the Office of Rail and Road.
Safety is our foremost priority in operating the railway. That’s why we have a robust series of metrics that we use to ensure we’re doing everything we can to ensure the overall safety of passengers, workforce and the public in respect of the risks associated with all aspects of the design, construction, maintenance and operation of the railway system.
Note: unless specified otherwise, all data on and linked from this page is for initial indications only and is subject to change in subsequent publications