📊Hierarchy of Hazard Controls in Occupational Health and Safety

 

✅ Hierarchy of Hazard Controls in Occupational Health and Safety

The Hierarchy of Controls is a system used to minimize or eliminate exposure to hazards. It ranks control methods from most effective to least effective.

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🔺 1. Elimination (Most Effective)

• Definition: Physically remove the hazard.

• Example: Use prefabricated parts to eliminate on-site cutting with power tools.

• ✅ Best method — removes the risk entirely.

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🔸 2. Substitution

• Definition: Replace the hazard with a safer alternative.

• Example: Use water-based paint instead of solvent-based paint.

• ⚠️ Must ensure the substitute doesn't introduce new hazards.

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🔹 3. Engineering Controls

• Definition: Isolate people from the hazard through design or equipment.

• Example:

  • Machine guarding

  • Local exhaust ventilation

  • Sound enclosures for noisy equipment

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🔸 4. Administrative Controls

• Definition: Change the way people work.

• Example:

  • Job rotation to limit exposure

  • Safety training and signage

  • Safe work procedures (SWPs)

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🔻 5. Personal Protective Equipment (PPE) (Least Effective)

• Definition: Equip workers with protective gear to reduce exposure.

• Examples:

  • Gloves, goggles, helmets, respirators

• ⚠️ Relies on human behavior and proper use — last line of defense.

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📊 Hierarchy Pyramid Diagram (Top to Bottom):

1. Elimination

2. Substitution

3. Engineering Controls

4. Administrative Controls

5. PPE

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📌 Summary Table:

Level	Control Type	Example
1 (Best)	Elimination	Remove working at height task
2	Substitution	Replace toxic chemical with a safer one
3	Engineering Controls	Install machine guards
4	Administrative Controls	Job rotation, training, signage
5 (Last Resort)	PPE	Gloves, face masks, earplugs

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