Public relations, according to management theorists, is a "staff' function instead of a "line" function. Within this "staff' function, there are levels of influence and authority ranging from advisory to compulsory advisory and concurring authority. If you were a member of a corporate public relations department, which level of influence and authority would be best for your productivity and influence in the organization? Public relations, according to management theorists, is a "staff' function instead of a "line" function. Within this "staff' function, there are levels of influence and authority ranging from advisory to compulsory advisory and concurring authority. If you were a member of a corporate public relations department, which level of influence and authority would be best for your productivity and influence in the organization?