Planning involves defining goals, strategies, and coordinated plans. It can be informal with unwritten plans or formal with specific written goals and action plans. Planning provides direction, coordination, control, and helps anticipate issues. It establishes a hierarchy from broad strategic plans to specific operational plans. Effective planning involves setting objectives, considering alternatives, and developing budgets. The level of planning depends on the manager's level in the organization. Principles of effective planning include contributing to objectives, having clear and attainable goals, and establishing consistent planning premises.