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Safety's Hierarchy of Controls with Examples

March 07, 2020 2 min read

Safety's Hierarchy of Controls with Examples

Do you ever wonder why some hazards are controlled with ten-page specialized procedures, automated double-wall enclosures, and back-up power systems? 

And some other times, we just throw a high-vis vest at the problem and keep going? 

Well, there’s a method to the madness. That method is known as the hierarchy of controls. 

safety's hierarchy of controls

As you probably know, not all hazards are created equal. Some have the potential to result in severe consequences with a reasonable probability, like for instance a vehicle crash. While others may cause minor discomfort, like a paper cut.

It wouldn’t make sense to approach all hazards with the same level of care.

We needed an ordered way to control hazards that’s ordered and logical.

That’s where the hierarchy of controls comes in.

 

Safety's Hierarchy of Controls

The hierarchy of controls is used to address hazards, starting from the most effective and going down to the least effective methods. 

To illustrate how the hierarchy of controls work, we are going to use the example of a simple hazard like the heat of a flame, in a scenario we can all identify with; cooking. 

hierarchy of controls

We are going to work down the hierarchy of controls, finding different ways to address the risks of being exposed to heat and flame.

Elimination

The first step is to evaluate if we can eliminate the flame. Is this flame essential to the work process?

What if we don’t need to heat anything?

safety's hierarchy of controls

If not, easiest way to make sure no one gets burned, is to eliminate the flame.

Substitution

Substitution is replacing something that produces a hazard with something that produces a less severe hazard. For this one, let’s substitute the open flame for something a bit more controllable and less hazardous, let’s say a microwave. 

hierarchy of controls

Engineering Controls

Engineering controls isolate people from the hazard, preventing contact with the hazard.

So, let’s take that flame, and engineer the workspace so that it keeps people away from the source of heat, such as using an oven.

safety's hierarchy of controls

Administrative Controls

After that, are administrative controls, which change to the way people work to make sure work can be done safely.

This could be using a procedure such as keeping people out of the area while the flame is live, training employees to cook safely, or staying a safe distance from the flame.

safety's hierarchy of controls administrative controls

Personal Protective Equipment

Lastly, PPE is the last line of defense because it is the least effective.

PPE provides a barrier against hazards. If we were to outfit people who worked in the kitchen with oven mitts, that would be an example of using PPE.

safety's hierarchy of controls

That's Safety's Hierarchy of Controls

And that’s a quick look at how the hierarchy of controls works. 

It’s a pretty simple concept that can be applied to almost any scenario.

So next time you need to find a way to control a hazard, remember, work from the most effective method, to the least effective, down the hierarchy.

 

 


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