A fit-for-duty test determines if the employee is physically able to perform their current role safely.

According to OSHA, fit for duty means that an individual is in a physical, mental, and emotional state that enables the employee to perform the essential tasks of his or her work assignment in a manner that does NOT threaten the safety or health of oneself, co-workers, property, or the public at large. Employers sometimes require fit-for-duty tests to gauge whether an employee can safely perform essential job functions.