A safety coffee machine

It is at this point that the work of the safety architect begins. He must imagine a generic software and hardware architecture (known as a generic platform) that can support the development and implementation of a railway application. A bit like a 

Safety of Computer Architectures Edited by Jean-Louis Boulanger 

Like an artist, the architect must imagine, design, and constantly challenge these choices so that the platform concepts securely provide the necessary requirements and properties. 

The concepts and safety principles are viewed as barriers allowing the execution of algorithms related to the functional of the scope of the application, thus avoiding 

The analysis of barriers should take into account the duality availability/safety. In view of the complexity and of system automation, availability becomes a sizeable criterion when designing and implementing reliable and secure concepts. The system must be tolerated by normal and/or transient variations (noise transmission, 

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