Which of the following outputs is reviewed in the mission analysis phase?

During the mission analysis phase of the Military Decision-Making Process (MDMP), the focus is on understanding the operational environment and refining the mission to ensure clarity and purpose. The approved mission statement stands as a critical output because it encapsulates the command's intent, outlines the objectives, and provides the foundation for subsequent planning and decision-making.

This mission statement is derived from an analysis of various factors, including the commander's guidance, the operational environment, and the available resources. It serves to align the staff and subordinate units under a clear directive, facilitating effective planning and coordination efforts throughout the rest of the MDMP.

In terms of the other options, while refined planning guidance from the commander and operational timelines are important elements in the overall process, they are typically established or elaborated upon in later phases. COA statements and sketches represent outputs that occur after the mission analysis phase, as they depend on the mission statement and other assessments being first clarified. Thus, the approved mission statement is the key output that is specifically reviewed during the mission analysis phase.