Line authority is a hierarchical form of authority where managers directly oversee and make decisions for employees in the chain of command from top to bottom positions. A line manager has complete control over directing employee work and decisions. In contrast, staff authority provides advisory and support roles to line functions by assisting and recommending, but are not part of the direct chain of command. Staff managers offer knowledge and expertise to other departments, such as a marketing executive assisting production with forecasts and demand generation.