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A Counterblast to N Version Programming
How do ya do and shake hands, shake hands, shake hands. How do ya do and shake hands and state your name and business… Tweedle Dum & Dee (Through the Looking Glass) Lewis Carrol You would have...
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Rotor Bursts and Single Point of Failure
It appears that the underlying certification basis for aircraft safety in the event of a intermediate power turbine rotor bursts is not supported by the rotor failure seen on QF 32.
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Buncefield – The alternate view
The Buncefield report: Or overlooking the obvious Why sometimes simpler is better in safety engineering. In the early hours of Sunday 11th December 2005, a number of explosions occurred at Buncefield...
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The Philosophica Safety Principia
In June of 2011 the Australian Safety Critical Systems Association (ASCSA) published a short discussion paper on what they believed to be the philosophical principles necessary to successfully guide...
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Toyota and the sphagetti monster
Economy of mechanism and fail safe defaults I’ve just finished reading the testimony of Phil Koopman and Michael Barr given for the Toyota un-commanded acceleration lawsuit. Toyota settled after they...
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Possibilistic design in aviation
I’ve recently been reading John Downer on what he terms the Myth of Mechanical Objectivity. To summarise John’s argument he points out that once the risk of an extreme event has been ‘formally’...
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Safety systems, Hume and uniformity
One of the canonical design principles of the nuclear weapons safety community is to base the behaviour of safety devices upon fundamental physical principles. For example a nuclear weapon firing...
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