Which of the following is a key component of administrative controls?

Job rotation is a key component of administrative controls because it involves systematically changing the tasks assigned to workers to reduce occupational exposure to hazards. By rotating jobs, employees can minimize repetitive strain injuries and reduce the amount of time they are exposed to potentially harmful conditions or substances. This strategy helps to enhance worker safety and health without relying solely on physical changes to the work environment or additional protective equipment.

The other options, while important in their own right, do not fall under the category of administrative controls. Providing personal protective equipment (PPE) is a form of engineering or personal protection measure, not administrative. Safety signage is a form of hazard communication and contributes to awareness but does not directly alter work practices. Improving ventilation is commonly classified as an engineering control, as it involves physical modifications to the environment to improve air quality rather than changing work organization or policies.