The principle is unity of command.

Quick Scoop

In management, the principle of unity of command states that each employee should have one, and only one, supervisor to whom they are directly responsible.

This avoids confusion, conflicting instructions, and overlapping authority by making sure instructions and accountability come from a single superior.

In exam-style questions, whenever you see a phrase like “one supervisor” or “one superior to whom he or she is directly responsible,” the correct answer is almost always unity of command.

TL;DR:
The principle in which an employee should have only one supervisor to whom he or she is responsible is unity of command.

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