Final answer:
The least effective method to reduce the risk of a sharp injury is administrative controls. These controls rely on policies and rules, which are less effective compared to physical modifications or specific protocols. Personal protective equipment (PPE) is a more effective method in reducing sharp injury risks.
Step-by-step explanation:
The least effective method that can be used to reduce or eliminate the risk of a sharp injury is administrative controls. While engineering controls involve physically altering the environment to prevent sharp injuries (e.g., installing safety guards on equipment), work practice controls require employees to follow specific procedures and protocols (e.g., using proper techniques when handling sharp objects). However, administrative controls involve implementing policies and rules to mitigate the risk of sharp injuries, such as providing training and education on proper handling and disposal of sharp objects.
Despite their importance, administrative controls are less effective compared to engineering controls and work practice controls because they rely on human behavior and compliance. While policies and rules can encourage safe practices, they do not physically eliminate or reduce the risk as effectively as physical modifications or specific protocols do. Therefore, the use of personal protective equipment (PPE) is also a more effective method in reducing sharp injury risks than administrative controls.