3-30. During and after engagement of a target, assessment continues with the confirmation of effects created against the target and an initial BDA. The three components of BDA are the physical damage assessment, the functional damage assessment, and the target system assessment. The physical damage assessment is the quantitative extent of physical damage to the target. The functional damage assessment weights the ability of the target to perform its mission against the mission objective established against the target. Target system assessment is a broad assessment of the effectiveness of all types of engagement against a target system. The initial BDA will focus on physical damage assessment while the remaining BDA are developed later. BDA should drive several decisions by the commander, including the need to reattack the target, adjustments to attack guidance to improve effectiveness in the future, and the need to shift to a branch plan if the required effect could not be created.