Which document primarily guides the Military Decision Making Process (MDMP)?

The document that primarily guides the Military Decision Making Process (MDMP) is the Army Doctrine Publication (ADP) 5-0. This publication specifically outlines the Army's approach to planning and decision-making processes, which includes the MDMP itself. ADP 5-0 provides the essential principles, frameworks, and methodologies that leaders use to conduct effective planning.

By emphasizing the importance of the MDMP in military operations, ADP 5-0 serves as a foundational reference for understanding and executing the process, making it the correct choice. This document captures the critical elements of planning and the structured approach used by Army units to develop and refine their plans.

The other documents listed have different focuses: Field Manual (FM) 3-0 primarily addresses operational concepts and doctrine relevant to Army operations, while Joint Publication (JP) 5-0 deals with joint planning processes and is more application-oriented across services rather than specifically about the Army's MDMP. Army Regulation (AR) 600-100 pertains to Army leadership and the responsibilities associated with it but does not concentrate on the MDMP itself.