Safety-integrity is the quantified trust that a safety-related system (hardware, software, or both) will perform its required safety functions correctly on demand and within a specified performance level. It is characterized by measurable targets such as Safety Integrity Levels (SIL 1–4) or Performance Levels (PL a–e), defined by the probability of dangerous failure per hour (PFHd) or average time to dangerous failure (TFHd). Its persistence is maintained through standardization (IEC 61508 for general industry, IEC 61511 for process sectors, ISO 13849 for machinery), third-party certification, periodic functional safety assessments, and lifecycle verification from design through decommissioning. [formal: integritas securitatis | substrate: mind | horizon: a life | explicit: yes | epoch: 0.98]
Accepted ontology entry
safety-integrity
Safety-integrity is the quantified trust that a safety-related system (hardware, software, or both) will perform its required safety functions correctly on demand and within a specified performance level. It is characterized by measurable…
Definition
Why it is in scope
a measure of confidence that a safety-related system will perform its required safety functions correctly under all required conditions; built to persist through functional safety standards (IEC 61508/61511), certification regimes, and regulatory compliance frameworks
Names and aliases
- safety-integrityen · CANONICAL
Relations from this entry
- cms9293jz002i7skq3m4d9hr1SERVES →
Safety-integrity provides quantified confidence measures that safety systems perform required functions — this metric serves safety-management by giving managers actionable data on system reliability and risk posture per Law 8d.
- cmrwiv1rn00a8soacg5vdpiogINSTANCE_OF →
safety-integrity is a specific kind of metric: a quantified measure of confidence in safety system performance. Per Law 9, a competent speaker would call safety-integrity 'a metric' (specifically, a safety metric). Direction: specific → general. Nearest kind is 'metric' — no intermediate rung exists.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Aug 1, 2026, 8:27 AM UTC
- Content hash
- c2c6c0d6f1a492795819f8297a79fdf4a4721101b8f19d75ca20b87cb08f183b