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Safety assurance of complex systems Part 2: Assurance and analysis

Methods used to examine complex systems must take a systems approach, and recognize that systems consist of more than their components.

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System safety as a dedicated profession can be traced back to the 1960s. However, already back in the 1940s engineers realized that the “fly-fix-fly”-approach to safety was not a viable way forward because of the cost of accidents. 

They wanted to prevent (new) accidents from occurring, not just learn from previous accidents and make sure that they did not happen again. The latter is, of course, important, but today’s (open) society is less tolerant towards some accidents occurring following the introduction of new (and safety-critical) systems, before we can start learning to prevent them from recurring.

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Safety in complex systems is an emergent system property and cannot be determined through component reliability. Read more in the paper on Safety Assurance of Complex Systems.