What is the order of the hierarchy of controls in the workplace from most to least effective?

• A. PPE, Administrative controls, Engineering controls, Elimination
• B. Elimination, Substitution, Engineering controls, Administrative controls, PPE
• C. PPE, Substitution, Elimination, Administrative controls
• D. Administrative controls, PPE, Substitution, Elimination

Answer: (B)

The main idea is that how a hazard is addressed determines protection level. The most protective approach is to remove the hazard altogether—elimination. If you can’t remove it, you replace it with something less dangerous—substitution. If removal or substitution isn’t possible, you design the setup so the hazard is kept away from people—engineering controls like ventilation, guards, or isolation. If exposure can still occur, you change how work is done—administrative controls such as policies, training, or scheduling. Finally, personal protective equipment provides a last line of defense and relies on correct use, so it’s the least protective of the measures.

So, the order from most to least effective is elimination, substitution, engineering controls, administrative controls, and PPE. Other sequences place PPE too early or misplace elimination, which reduces overall protection.