Introduction to Hierarchy of Controls
The hierarchy of controls is a systematic approach used to manage workplace risks and improve safety outcomes. It ranks protective measures by effectiveness, guiding decisions from the most reliable to the least reliable options.
Organizations apply this framework to reduce hazards, streamline compliance, and build a proactive safety culture. Understanding each level helps teams prioritize investments that deliver the greatest long-term protection.
Elimination and Substitution
Fundamental Risk Reduction
Elimination removes the hazard entirely, while substitution replaces a dangerous element with a safer alternative. These top-level strategies address risk at the source before relying on downstream protections.
Engineering Controls
Isolation and Design Solutions
Engineering controls physically isolate people from hazards through design, technology, or equipment modifications. Examples include machine guards, ventilation systems, and automated processes that reduce manual handling.
Administrative Controls
Procedures, Training, and Monitoring
Administrative controls change how work is performed through policies, training, schedules, and supervision. While they do not remove hazards, they limit exposure by guiding safer behaviors and routines.
Personal Protective Equipment
Last Line of Defense
Personal protective equipment (PPE) protects individuals when other controls are not sufficient or during implementation gaps. Proper selection, fit, use, and maintenance are essential for PPE to be effective and reliable.
Implementing the Hierarchy in Practice
- Identify hazards through systematic assessments and worker input.
- Prioritize controls starting with elimination and substitution whenever possible.
- Design engineering solutions to remove or isolate risks at the source.
- Strengthen procedures with clear training, supervision, and performance monitoring.
- Use PPE consistently as a backup when other controls are insufficient.
FAQ
Reader questions
What is the main purpose of the hierarchy of controls?
It provides a prioritized framework for managing risks, emphasizing the most effective strategies like elimination and engineering controls before relying on PPE.
Can engineering controls replace the need for PPE?
Yes, when engineered solutions fully isolate or remove the hazard, PPE may no longer be required for that specific risk.
How often should administrative controls be reviewed?
Organizations should review and update administrative controls at least annually or whenever processes, regulations, or hazards change.
Is elimination always possible in the workplace?
Elimination is not always feasible, which is why the hierarchy encourages using the most effective available control combination for each hazard.