What is NOT one of the four planning levels for Contingency Planning?

The concept of contingency planning typically involves four key levels that provide a structured approach to preparing for unexpected situations. Among these levels, "Base Plan," "Commander’s Estimate," and "Operation" are recognized stages that serve distinct roles in the overall planning process.

The "Base Plan" lays the foundation for operational strategies and outlines the essential components necessary for a successful response. The "Commander’s Estimate" involves a thorough analysis of the situation, allowing leaders to evaluate options and determine the best course of action. The "Operation" level encompasses the detailed execution of plans, ensuring that all personnel understand their roles in response scenarios.

In contrast, the term "Mission Brief" is not recognized as one of the formal planning levels in contingency planning. While mission briefs are important tools for communicating information and directives, they do not constitute a planning level but rather serve as a supplementary element to ensure that all team members are aligned on objectives and understand their responsibilities during operations. Thus, it is not included among the primary categories of contingency planning established in doctrine.