A fail-safe is a design approach in which a system is engineered to respond to a detected failure or fault by automatically transitioning into a predefined state that minimizes potential harm. The defining parameters are: (1) a failure detection mechanism (sensors, monitoring, or intrinsic system behavior), (2) a designated safe state (e.g., powered-down, isolated, or contained), and (3) a failover path that operates without requiring human intervention. It persists through engineering design standards (e.g., IEC 61508, AS9100), safety codes, regulatory requirements, and the sustained practice of safety-conscious engineering across industries. [formal: latens | substrate: behavior | horizon: a life | explicit: yes | epoch: 0.01]
Accepted ontology entry
fail-safe
A fail-safe is a design approach in which a system is engineered to respond to a detected failure or fault by automatically transitioning into a predefined state that minimizes potential harm. The defining parameters are: (1) a failure det…
Definition
Why it is in scope
A design approach whereby a system, upon detecting a failure or fault condition, automatically transitions to a state that minimizes harm to people, equipment, or the environment. It is a human-made engineering concept that persists through design standards, safety codes, and engineering practice across industries such as nuclear power, aerospace, and industrial process control.
Names and aliases
- fail-safeen · CANONICAL
Relations from this entry
- cms8olo5701ld73fkxedp404qSERVES →
Fail-safe mechanisms are engineered to default to a safe state upon failure. Their designed purpose is to serve process-safety — they exist for the sake of preventing process failures from escalating into accidents. Remove process-safety as the target and fail-safe loses its entire reason for being. The relation is teleological: servant (fail-safe mechanism) points at master (process-safety objective).
- cms8comye00gt73fkl26ui8mdSERVES →
Fail-safe is designed and maintained for the sake of safety-engineering: it is the design approach ensuring systems default to a safe state upon failure, which is a core objective of safety engineering. Law 8d: for whose sake? The fail-safe principle serves safety engineering's goal of preventing catastrophic failure.
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No accepted relations in this direction.
Record identity
- Created
- Jul 31, 2026, 10:26 AM UTC
- Content hash
- b53dafe832dd690f8821e3ff2203006d0652f2c826e5846c2151eb8085f91a22