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« Do You Design Flight Software? | Main | Systems Huge and Really Tiny »

January 20, 2010

It's All About the Evidence

By Bill Graham

Graham_lg An important distinction that gets drilled into people new to safety critical systems and certification of said systems is the difference between "certified" and "certification evidence." When certifying a safety critical system to a very strict standard such as DO-178B, the system as a whole is certified not individual components such as operating systems or middleware.

Verification and validation of safety critical systems is very expensive and time consuming. However, to greatly reduce the burden of testing and test reporting,  the use of Commercial Off-The-Shelf (COTS) hardware and software is required.

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