Last period performance

Overall performance for Period 8 2011/12

Note: Latest information correct at time of publication. 

Period 8 Public Performance Measure (PPM) moving annual average (MAA) is at 90.6%, which is up 0.2 percentage points from last period and down 0.6 percentage points since Period 8 last year. Period 8 actual performance was 89.3%, up 2.8 percentage points since Period 8 last year.

PPM (actual) – 89.3% in Period 8 (16 October 2011 – 12 November 2011)

PPM (MAA) – 90.6% in Period 8 (16 October 2011 – 12 November 2011)

Breakdown of Overall Delay Minutes

• The total number of industry delay minutes has increased by 8.4% for the thirteen periods ending 12 November 2011, compared to the thirteen periods ending 13 November 2010
• Network Rail delay minutes in Period 8 were 646k, a decrease of 19.6% on Period 8 last year
• TOC-on-Self delay minutes in Period 8 were 312k, a decrease of 13.9% on Period 8 last year
• TOC-on-TOC delay minutes in Period 8 were 130k, a decrease of 13.2% on Period 8 last year

PPM methodology

PPM combines figures for punctuality and reliability into a single performance measure.

PPM measures 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 ‘on time’ compared to the total number of trains planned.

A train is defined as ‘on time’ if it arrives within five minutes (i.e. 4 minutes 59 seconds or less) of the planned destination arrival time for London and South East or regional services, or 10 minutes (i.e. 9 minutes 59 seconds or less) for long distance services.

Where a train fails to run its entire planned route calling at all timetables stations it will count as a PPM failure.

Delay minute methodology

A delay minute is defined as a measure equating to one train being delayed for one minute when compared with the timetabled journey time between two points.

The main data set used for reporting both the TOCs and Network Rail delays is the Industry Period Performance Report (IPPR). The delay figures presented here are consistent with those in the IPPR as both reference the adjusted delay series.

The purpose of developing the adjusted delay series was to apportion the disputed delay minutes to the TOCs and Network Rail in line with a likely outcome of dispute resolution.