The public performance measure (PPM) shows the percentage of trains which arrive at their terminating station on time.
PPM combines figures for punctuality and reliability into a single performance measure. It is the industry standard measurement of performance.
The table below includes the following four regions:
Birmingham line - all trains serving Princes Risborough or any station north thereof
High Wycombe line - trains only serving stations Princes Risborough, Aylesbury (or south thereof, via High Wycombe)
Aylesbury line - all trains serving Aylesbury Vale Parkway or any stations south thereof (via Amersham)
Oxford line - all trains serving Bicester Village or any station north thereof
Punctuality and Reliability PPM
| 4 weeks ending |
Birmingham line |
High Wycombe line |
Aylesbury line |
Oxford line |
|---|---|---|---|---|
| 27/05/17 | 93.11% | 96.03% | 96.75% | 90.38% |
| 24/06/17 | 88.90% | 92.54% | 93.74% | 85.63% |
| 22/07/17 | 92.59% | 95.54% | 94.84% | 87.07% |
| 19/08/17 | 94.70% | 96.99% | 97.29% | 92.34% |
| 16/09/17 | 91.16% | 91.98% | 93.89% | 87.14% |
| 14/10/17 | 92.32% | 95.45% | 93.57% | 89.14% |
| 11/11/17 | 91.73% | 94.76% | 92.01% | 87.72% |
| 09/12/17 | 92.61% | 96.50% | 92.03% | 91.30% |
| 06/01/18 | 88.62% | 93.83% | 90.64% | 85.04% |
| 03/02/18 | 93.70% | 95.75% | 94.52% | 90.64% |
| 03/03/18 | 89.76% | 93.58% | 92.62% | 85.01% |
| 31/03/18 | 92.91% | 96.12% | 95.42% | 92.16% |
| 28/04/18 | 94.86% | 97.3% | 96.89% | 95.47% |
| 26/05/18 | 91.69% | 95.9% | 96.07% | 91.32% |
| 23/06/18 | 91.87% | 95.68% | 93.85% | 90.39% |
| 21/07/18 | 89.36% | 95.43% | 93.14% | 87.68% |
Punctuality
Right time punctuality measures the proportion of trains arriving at their terminal station early or within 59 seconds of their scheduled arrival time.
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