1. Purpose. This instruction establishes the methodology for conducting the three components of Combat Assessment (CA) that may result in a re-attack recommendation (RR): battle damage assessment (BDA), collateral damage assessment (CDA), and munitions effectiveness assessment (MEA). It provides analysts with the definitions, methodology, and principles of reporting required for CA. It bridges the gap between doctrinal guidance provided in Joint Publications (JPs) and Combatant Commands’ (CCMDs’) CA programs.