Final answer:
First-level managers are the supervisors directly responsible for personnel performing non-managerial tasks, acting as the interface between the workforce and higher management levels.
Step-by-step explanation:
The level of management that is directly responsible for supervising individuals performing non-managerial jobs is commonly known as first-level management. These managers are the most 'hands-on' with employees and are often seen with titles like supervisor, team leader, or department manager. They play a crucial role in the hierarchy of authority in any business structure. Their tasks include directing day-to-day activities, guiding and training employees, and ensuring that the team meets its short-term objectives and performance targets.
A real-world example of first-level management can be seen in a restaurant where the floor manager is responsible for supervising the servers, hosts, and the kitchen staff. This manager ensures that the restaurant operates smoothly on a daily basis.