Which document is typically used to assign responsibilities within a specific unit?

The document most commonly used to assign responsibilities within a specific unit is the Operating Instructions (OI). Operating Instructions are designed to provide specific guidance and procedures tailored to the unique needs and operations of a unit. They outline roles, responsibilities, and procedures necessary to achieve effective mission execution within that unit.

In contrast, Air Force Instructions (AFIs), while authoritative and directive in nature, serve as broader regulations that apply across the entire Air Force rather than assigning unit-specific responsibilities. Directive Publications also provide guidance but tend to cover overarching policies rather than detailed responsibilities at the unit level. Air Force Supplements (AFS) are typically intended to complement and clarify AFIs rather than establish unit-specific duties. Thus, the OI is the most appropriate document for this purpose, providing clear and direct assignments appropriate to the unit's operational context.