Safety engineering is the engineering discipline concerned with designing systems that avoid causing harm to people, property, and the environment under both normal and fault conditions. It applies hazard analysis, redundancy, fail-safe design, and quantified risk assessment across the system lifecycle. Functional safety and reliability engineering are specialised branches that address fault behaviour and dependable operation.
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- Practitioners use hazard analysis, fault trees, redundancy, and fail-safe design to drive residual risk to acceptable levels. Its specialised branches address how systems behave under faults and how dependably they sustain correct operation over time.