Functional safety

We audit the operational environment to assess risk associated with a component or subsystem. Hazards and safety functions have to be reviewed, including a process of function reviews, formal HAZIDs, HAZOPs and accident reviews.

Safety integrity level (SIL), and other assessments such as PL, AgPL, ASIL, are applied not just to a component or a part of the system but to the end-to-end safety function of the system.

We ensure that the safety function performs to the design intent, even under conditions of incorrect operator input and failure modes. Failure modes for a device are typically determined by Failure Mode and Effects Analysis of the system (FMEA). Failure probabilities for each failure mode are typically determined using failure mode, effects, and diagnostic analysis FMEDA.

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