Hierarchy of Controls: Proactive VS Reactive VS Effectiveness Percentage

 Hierarchy of Controls: Proactive vs Reactive vs Effectiveness Percentage:

1. Elimination (Proactive):

Description: Completely removing the hazard from the workplace.

Effectiveness: Approx.~100% (if the hazard is entirely removed, the risk is eliminated).

Example: Redesigning a workflow to eliminate the use of a hazardous chemical.

Why Proactive: This measure addresses the hazard before it can pose a risk, preventing it from occurring.

2. Substitution (Proactive):

Description: Replacing a hazardous substance or process with a less hazardous one.

Effectiveness: Approx.~80-90% (depending on how much safer the substitute is).

Example: Using a non-toxic solvent instead of a toxic one.

Why Proactive: This control changes the nature of the risk before it can cause harm, proactively reducing the hazard.

3. Engineering Controls (Proactive):

Description: Isolating people from the hazard using physical means.

Effectiveness: Approx.~70-90% (can greatly reduce exposure but may not eliminate the hazard entirely).

Example: Installing ventilation systems to remove harmful fumes.

Why Proactive: It modifies the work environment to reduce exposure to hazards before they pose a threat.

4. Administrative Controls (Proactive and Reactive):

Description: Changing the way people work to reduce exposure to hazards.

Proactive Examples: Implementing safety training programs, establishing safety policies.

Reactive Examples: Updating procedures following an accident, conducting a safety audit after an incident. Effectiveness: Approx.~50-70% (depends on consistent implementation and adherence).

Why Both: These controls can be implemented in advance to prevent hazards (proactive) or in response to an identified risk or incident (reactive).

5. Personal Protective Equipment (PPE) (Reactive):

Description: Using protective clothing and equipment to shield workers from hazards.

Effectiveness: Approx. ~10-30% (relies on correct use and does not eliminate the hazard).

Example: wearing safety goggles and gloves. Why Reactive: It serves as the last line of defense, protecting workers when other controls cannot fully eliminate the risk.

Summary of Effectiveness and Proactivity

Proactive Controls: Approx.

Elimination: ~100%

Substitution: ~80-90%

Engineering Controls: ~70-90%

Administrative Controls (when involving preventive measures): ~50-70%

Reactive Controls: Approx.

Personal Protective Equipment (PPE): ~10-30% Administrative Controls (when involving responses to incidents or identified hazards): ~50-70%

By implementing these controls, you can effectively reduce or eliminate hazards in the workplace, with a priority on proactive measures to prevent risks from materializing.