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2. The five invariants of system safety
2.1 Shared definitions and standards for safety
Accidents most often occur at the interfaces between the assembly of several systems, due to misunderstandings between the various designers or between disciplines.
One example is the destruction of the Mars Climate Orbiter on September 24, 1999 . The probe, programmed to use the metric system, received data in Anglo-Saxon units of measurement.
As a result, instead of entering orbit at an altitude of around 150 km, it plunged into the Martian atmosphere at an altitude of 57 km,...
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The five invariants of system safety
The design process: principles, procedure and illustration
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AFNOR – Association française de normalisation
ADEME – French Environment and Energy Management Agency
CETIM –...
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