Archives For assumptions

Thinking about the unintentional and contra-indicating stall warning signal of AF 447 I was struck by the common themes between AF 447 and the Titanic. In both the design teams designed a vehicle compliant to the regulations of the day. But in both cases an implicit design assumption as to how the system would be operated was invalidated.

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The Right Attitude

27/05/2011 — 1 Comment

How the design of the Apollo Command Module Attitude Reference Indicator illustrates the importance of cultural cliches or precedents in coordinating human and software behaviour.

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A UAV and COMAIR near miss over Kabul illustrates the problem of emergent hazards when we integrate systems or operate existing systems in operational contexts not considered by their designers.

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What a near miss flooding incident at a french reactor plant in 1999, it’s aftermath and the subsequent Fukushima plant disaster can tell us about fault tolerance and designing for reactor safety.

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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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