SSA disability adjudication uses a sequential evaluation process ending with vocational questions at steps 4 and 5. Vocational experts apply Dictionary of Occupational Titles (DOT) terminology and SSA-specific frameworks that differ from civil-litigation vocational analysis. Since January 6, 2025, SSR 24-3p has governed how vocational expert evidence is presented and evaluated; it rescinded and replaced SSR 00-4p.