DFA connects design decisions to the first buildDesign, data, process and acceptance evidence converge at a controlled release. First-article observations inform changes, not undocumented substitutions.DFA connects design decisions to the first buildDesignFootprints + accessDataBOM + placementProcessPaste + solderingEvidenceInspection + testRelease gate: every open question has an owner and disposition.Re-export and verify after changes; preserve the accepted build revision.³Ô¹Ïtv engineering schematic · illustrative, not an inspection record