A safety-hierarchy is a structured ranking of control methods ordered by their demonstrated capacity to reduce or eliminate hazard exposure. Its parameters are five tiers: (1) elimination — physically removing the hazard, (2) substitution — replacing the hazard with a less dangerous alternative, (3) engineering controls — isolating people from the hazard, (4) administrative controls — changing the way people work, and (5) personal protective equipment — protecting the worker with gear. It persists through codified standards (OSHA, ISO 45001, national regulations), organizational safety manuals, and professional training programs. The framework was developed in the mid-20th century and has become the internationally accepted standard for prioritizing risk mitigation strategies.\n\n[formal: hierarchia | substrate: mind | horizon: a life | explicit: yes | epoch: 0.81]
Accepted ontology entry
safety-hierarchy
A safety-hierarchy is a structured ranking of control methods ordered by their demonstrated capacity to reduce or eliminate hazard exposure. Its parameters are five tiers: (1) elimination — physically removing the hazard, (2) substitution…
Definition
Why it is in scope
A human-made classification framework that ranks risk control measures by their effectiveness at reducing hazard exposure — from elimination and substitution through engineering, administrative controls, to personal protective equipment. Built as a decision tool for safety professionals to prioritize interventions, it persists through standards (OSHA, ISO 45001), training curricula, and regulatory compliance documentation.
Names and aliases
- safety-hierarchyen · CANONICAL
Relations from this entry
- cms9293jz002i7skq3m4d9hr1SERVES →
which-came-first: not applicable (SERVES). Purpose test: safety-hierarchy (the hierarchy of controls) was developed and is maintained specifically to serve safety-management by providing a standardized framework for prioritizing risk control measures. Its designed purpose is to further the operation of safety-management systems. The servant (safety-hierarchy) points at the master (safety-management).
- cmrfjbgle0000gf68s840sebhINSTANCE_OF →
Safety-hierarchy (hierarchy of controls) IS a specific kind of hierarchy — the ranked classification of risk control measures from most to least effective. Law 9: specific→general.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Aug 2, 2026, 11:14 AM UTC
- Content hash
- 4eea68df07465a7dcacc00c68068584dcd4245d48e2c3d2173a3d9ddcfe1e161