2006 Q2 Wrong Side failures

[PJW]

I think this is where the discussion becomes more interesting. NwR Safety Central infers that PJW's definition could be seen as not correct on the basis of the "unsafe" statement:

Wrong Side Failure WSF
(i) Wrong Side Failure: something which fails in an unsafe condition (ii) Wrong Side Signalling Failure.  A wrong side failure occurs when equipment or a system does not fail safe. In other words, a failure occurs which could lead to an accident.
https://www.safety.networkrail.co.uk/Ser...ailure-WSF

However, everything PJW states is fundamentally correct! So could we deduce that choosing a more black and white example could provide a more robust, less subtle, answer? Possibly, but would stating our assumptions and definitions of what we deem a WSF to be before answering the question avoid the examiner interpreting the justification in a way we didn't intend and be a useful exam technique? Yes to the second question, perhaps to the first!

More opinions most welcome on this subject though.

I did say that I was old school and not ready to accept the redefinition of terms in order to satisfy those who are more worried about being "politically correct" in the new environment..........

Read "Drift into Failure" and "Thinking Fast and Slow"