Functional hazards

If the objective of the system is to alert about specific hazards, then these hazards are called functional hazards.

A functional hazard is due to an external trigger that motivates the system development and justifies the development costs. (for example, various alarm systems: medical monitors and public alarm generators about fire, environmental threats, intruders, etc.)

Examples

All kinds of safety systems, such as intruder alarms, environmental hazards, war alarms etc.

Types of functional hazards

Types of functional hazards include:

External hazards, main topics in the functional requirements: examples include alarm systems (such as about environmental threats) and safety instrumented systems (SIS)
External threats, such as obstacles (for example, in transportation),
Extreme conditions, such as slippery road, exceptional slope, sharp curve, weather conditions, etc.
Hostile activity (such as intruder, or enemy attack)