Operating Irregularities
Definition
Operating irregularities are the failures that occur on the network due to factors such as signalling, engineering or maintenance works, or train operations.
This graph shows the number of reported irregularities normalised by the number of signals, train miles and track miles.
Results
| 2005/06 | 2006/07 | 2007/08 | |
|---|---|---|---|
|
Operating irregularities (MAA) |
8.18 |
6.81 |
6.75 |
|
Operating irregularities |
5551 |
4627 |
4703 |
Commentary
Operating irregularities occur when operational rules, processes or procedures are not correctly followed or adhered to. There was no specific target set for operating irregularities for 2007/08 other than to continue to reduce them. Despite a 17% reduction in the number of events in 2006/07 compared to the previous year, levels during 2007/08 have essentially been maintained with a marginal increase of 1.5%.
Monitoring the number and thereby the frequency of events provides a simple numeric measure, but does not measure the consequence and hence the risk associated with each event. To address this Network Rail, working with RSSB, have developed a method of risk ranking all irregular working events (of which operating irregularities are a subset) such that awareness is gained, and priority given, to tackling those incidents and trends that present the greatest risk. This method of risk ranking has now been implemented and is being applied to all new events from the start of 2008/09. The Safety Management Information System (SMIS) has been modified to include more comprehensive reporting and categorisation of irregular working events such that appropriate mitigations can be applied.
Other specific actions/initiatives being taken to reduce irregular working events include:
- continued implementation of the ‘SAF6’ national voice communications training programme to improve quality of communication between key railway roles such as signallers, drivers, contractors and maintenance staff
- realising the benefits of implementing the COGNISCO competence testing programme to improve competence and understanding of the Rule Book amongst key operating staff
- further improvements to the existing safety communications monitoring process, technology and management regime
- continued application of the existing ‘Safety 365’ campaign to promote safe working and in giving teams ownership of, and the opportunity to take pride in, their safety performance