YBUG 7 A Safe and Fit for Purpose Railway Update on Yellow Book

1
YBUG 7A Safe and Fit for PurposeRailwayUpdate
on Yellow Book

• Bruce Elliott
• Atkins Rail

2
YB 3½
YB3Vol 1
YB Vol 1 Issue 4
YB3Vol 2
AN 5 Rel with EU Directives
AN 6 Maintenance
AN 7 GSN
3
YB 3½
YB3Vol 1
YB Vol 1 Issue 4
YB3Vol 2
AN 1Railway-level issues
AN 5 Rel with EU Directives
AN 2 Software
AN 6 Maintenance
AN 3Human Error
AN 7 GSN
AN 4 ISA
4
YB 4
YB Vol 1 Issue 4
YB Vol 2 Issue 4
AN 4 ISA
AN 5 Rel with EU Directives
5
Structure
YB Vol 2 Issue 4
Introductory material
Appendices
6
Scope

• All substantive guidance imported except
• Appendix D.1 Example safety policies
• Low value out-of-date
• Application Note 2 Appendix A Guidance on
  Serial Interlocking Specifications.
• Too detailed
• Application Note 3, Chapter 18 Summary of
  interaction between ESM and HF Activities and
  Chapter 19 Summary of points.
• Unnecessary now that the guidance on human
  factors is fully integrated
• Duplication removed
• Route maps added

7
Content generic changes

• Some project- or maintenance-specific guidance
  promoted to general guidance
• particularly maintenance-specific guidance on
  soft issues
• Anachronisms removed
• such as references to superseded legislation and
  references to Railtrack in the present tense
• Brought up-to-date with changes to referenced
  documents
• some references removed rather than updated
• the book should supplement, not repeat other
  sources

8
Some quotations from YB4V1

• If the risk comes completely within accepted
  standards that define agreed ways of controlling
  it, evidence that you have met these standards
  may be enough to show that you have controlled
  the risk. 2.3.2
• Before you decide that just referring to
  standards is enough, make sure that
• the equipment or process is being used as
  intended
• all of the risk is covered by the standards
• the standards cover your situation and
• there are no obvious and reasonably practicable
  ways of reducing risk further. 2.5.1

9
Content specific changes 1/3

• Tries to serve better those railway
  professionals whose work affects safety but who
  control risk through the disciplined and skilful
  application of standards, procedures and
  assessments
• YB3 did acknowledge situations where risk was
  better controlled through standards and
  procedures
• but readers had limited help with distinguishing
  what was relevant from what was not
• In YB4, where we know that the guidance may need
  adaptation for a particular situation, we say so
• In the next issue of the Yellow Book we intend to
  provide guidance on how to put fundamentals into
  practice when risk is controlled through
  standards and procedures
• including those that fall under the
  interoperability directives and ROGS regulations

10
Content specific changes 2/3

• Link to How safe is safe enough?
• Strengthen link between safety decision making
  and the operational environment
• Strengthen link between reliability and safety
• using ideas behind RCM
• Provide more guidance on interactions between
  system and operational context
• including people
• Minimise and highlight text which assumes ALARP

11
Content specific changes 3/3

• Distinguish two sorts of documents presenting
  evidence for safety
• based on analysis and forecast
• based on proof
• Recommend Hazard Logs for maintenance
• Relax some human factors guidance
• where it seemed to require the use of specialists
  on all projects
• Detailed corrections or improvements in response
  to suggestions numbered 7, 11, 12, 14, 15, 17-21

12
Acknowledgements

• Too many to list!

13
Questions?

• Bruce Elliott
• Chief Engineer
• Atkins Rail
• 07970 694043
• bruce.elliott_at_atkinsglobal.com