Comprehensive and Detailed AMatrixis the best modeling technique for gap analysis, as it provides aside-by-sidecomparison of requirements, functionalities, or processes between two systems. This helps the BAidentify gaps, redundancies, and missing featureswhen consolidating or choosing between systems. TheBABOK Guide (Chapter 10.33 - Matrices)states that matrices areparticularly useful for cross-referencing and tracking relationships between different sets of requirements.