Certified Healthcare Safety Professional (CHSP) Practice Exam

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Which control method is least effective according to the hierarchy of controls?

Engineering controls
Substitution
Administrative controls
PPE

The correct answer is: PPE

The least effective control method according to the hierarchy of controls is personal protective equipment (PPE). This is because PPE is used primarily as a last line of defense when other control measures cannot adequately mitigate risks. The hierarchy of controls prioritizes strategies that aim to eliminate or reduce hazards at their source. Engineering controls and substitution directly address the risks associated with a hazard, either by redesigning a process or replacing the hazardous material with something less dangerous. Administrative controls involve changing workplace policies or procedures to limit exposure to hazards, which can be effective and sustainable over time. PPE, while essential in providing additional protection, relies on individual compliance and proper use, which can vary among workers. If not used correctly or consistently, PPE may not provide the intended level of protection. Additionally, it does not eliminate the hazard; it merely enhances safety for the individual when they are exposed. Therefore, while PPE is crucial in protecting workers, it is recognized as the least effective method when considering the overall effectiveness of risk control measures.