Risk and Safety Engineering

One profisional about safety systems techniques : such as HAZOP in task A talk about failures elements ,effects and causes in table
, and FTA in task B produce a partial qualitative fault tree for this system. (Include about ten events) .
in task C The decision has been made to achieve adequate safety by ensuring that the Equipment Under Control (EUC) is suitably safe (rather than by the provision of an independent protection system). Starting from your fault tree, describe one IEC 61508 approach to establishing the required Safety Integrity Level (SIL) value of the ECU sub-system:
a. Adopting a qualitative approach
b. Adopting a quantitative approach.

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