The cornerstone of an effective planning system is a(n)

A) mission statement.
B) operational objective.
C) corporate culture.
D) code of ethics.
E) policy manual.

The mission statement defines the purpose, values, and direction of the organization, which is essential for effective planning. It serves as the foundation for developing operational objectives, strategies, and policies that align with the organization's overall mission and vision. Without a clear and concise mission statement, the planning process lacks direction and may lead to misalignment and inefficiencies. Therefore, having a well-crafted mission statement is crucial for building a robust and effective planning system.