Kelly is the first line manager.
First-line managers are the entry level of management, the individuals “on the line” and in the closest contact with the workers. They are directly responsible for making sure that organizational objectives and plans are implemented effectively.
They can be assistant managers, foremen, shift managers etc. they look after the internal issues of the organization.
Thus the Kelly who is held as a production supervisor, is responsible for 10 employees for assembling the components into finished product refers to the First line managers.
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