Which document accurately reflects the positions authorized to accomplish mission requirements?

The correct choice is the Unit Manpower Document (UMD) because it is specifically designed to outline the manpower requirements of a unit in relation to its mission. The UMD details the positions that are authorized for a unit to effectively carry out its assigned tasks, including the number of personnel required and the specific roles they are expected to fill. This makes it an essential tool for ensuring that a unit has the right mix of personnel to meet its operational needs.

Understanding the UMD is crucial for personnel management within the Air Force, as it helps in aligning the staffing levels with mission demands. The document serves as a reference for commanders and personnel managers to assess and fulfill the unit's manpower requirements accurately.

In contrast, the other options serve different purposes: the Unit Training Plan (UTP) focuses on training requirements; the Authorization Change Request (ACR) is used for proposing changes to authorized positions; and the Personnel Management File (PMF) contains individual records of personnel. None of these documents provide a comprehensive view of the positions authorized specifically for mission accomplishment like the UMD does.