KEEPING SOFTWARE UNDER CONTROL
With all of the examples we have seen so far, what common themes can we identify? There may be several themes that we could draw out of the examples, but one theme is clear: either insufficient testing or the wrong type of testing was done. More and better software testing seems a reasonable aim, but that aim is not quite as simple to achieve as we might expect.
Exhaustive testing of complex systems is not possible
With the Ariane 5 rocket launch, a particular software module was reused from the Ariane 4 programme. Only part of the functionality of the module was required, but the module was incorporated without changes. The unused functionality of the reused module indirectly caused a directional nozzle to move ...
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