Functional-safety is the discipline of ensuring that safety-related control systems perform their required functions correctly under all specified conditions, including fault states. It is defined by quantified performance targets (safety integrity levels) applied through a lifecycle of hazard analysis, requirements specification, design implementation, validation testing, and ongoing monitoring. The persistence mechanism is standardization (IEC 61508 series) and third-party certification of safety instrumented systems. [formal: functional-safety | substrate: behavior | horizon: a life | explicit: yes | epoch: 0.01]
Accepted ontology entry
functional-safety
Functional-safety is the discipline of ensuring that safety-related control systems perform their required functions correctly under all specified conditions, including fault states. It is defined by quantified performance targets (safety…
Definition
Why it is in scope
A human-made discipline that ensures systems — particularly control and instrumentation systems — operate correctly to prevent or mitigate hazardous events when things go wrong. It formalizes safety through engineered reliability rather than relying solely on physical protection.
Names and aliases
- functional-safetyen · CANONICAL
Relations from this entry
- cms8a929t007573fkafm8ap7iSERVES →
Functional-safety is specifically designed and maintained for the sake of risk-management: its entire purpose is ensuring safety-related systems perform correctly under fault conditions, which is exactly what risk-management frameworks require to control identified hazards. Law 8d: servant (functional-safety) points at master (risk-management).
- cms8comye00gt73fkl26ui8mdINSTANCE_OF →
Functional-safety is a specific kind of safety-engineering focused on achieving and maintaining safe state through systematic analysis of hazards and potential failures. Per Law 9: a competent speaker calls functional-safety 'a safety-engineering discipline'.
- cms8olo5701ld73fkxedp404qSERVES →
Functional-safety is designed and maintained for the sake of process-safety. Its systematic approach to hazard analysis, risk assessment, and safety instrumented systems exists to further the operation of process safety in industrial contexts. Per Law 8d: servant (functional-safety)→master (process-safety).
Relations to this entry
- cms8q5xxb01qy73fkyxdv7ob3← SERVES
safety-integrity-level is a classification system created and maintained for the sake of functional-safety. SIL levels (1-4) are the core quantitative mechanism by which functional-safety standards (IEC 61508/61511) specify, design, and verify safety requirements. Law 8d: for whose sake? SIL exists to make functional-safety engineering possible — it is the metric that functional-safety works around.
Record identity
- Created
- Jul 31, 2026, 8:57 AM UTC
- Content hash
- a12d5add93ff40c628a3cbf3efb07a0bcb736ac754fe8a04197d16931bad55fc