Building BIOS Architecture

Fail-Safe Architecture ensures that foreseeable BIOS, component, communication, power, configuration, or control failures produce a defined condition that minimizes harm.

Every safety-relevant function shall define:

normal state;

safe state;

degraded state;

failure-detection method;

transition trigger;

transition time;

local autonomous behavior;

manual override;

recovery conditions.

The safe state shall be hazard-specific. De-energized is not universally safe. A ventilation system, fire pump, emergency light, freeze-protection system, medical-support system, or access route may require continued or alternative operation.

The architecture shall address:

power loss;

communication loss;

BIOS Core failure;

sensor failure;

actuator failure;

storage corruption;

identity uncertainty;

state disagreement;

conflicting commands;

software crash;

cybersecurity compromise;

incomplete update.

Fail-safe behavior shall be implemented as close to the physical hazard as appropriate. Local controllers and physical interlocks shall not wait for remote BIOS or cloud instructions when immediate protective action is required.

Failure of status feedback shall not be interpreted as confirmation of the safe state.

Where no single universally safe state exists, the system shall implement a risk-prioritized emergency strategy and request human intervention.

Fail-safe functions shall be testable, and their test results shall be recorded.