The classical perspective focuses on direct inputs to efficiency, while the behavioral perspective examines indirect inputs too.
Scientific management focuses on improving efficiency and output through scientific studies of workers' processes.
Weber's bureaucracy focused on creating rules and regulations to simplify complex procedures in societies and workplaces.
Fayol's approach differed from scientific management in that it focused on efficiency through management training and behavioral characteristics.
The classical approach to management is often criticized for viewing a worker as a mere tool to improve efficiency.