DRBFM (Design Review Based on Failure Mode)

Systematic change analysis method developed by Toyota that focuses on potential failure modes introduced by design changes, process changes, or new applications. Different from FMEA which analyzes all possible failures in a design. DRBFM specifically targets the delta or change from previous working design, asking 'What changed and what could go wrong because of that change?' Uses GD3 questions: Good Design, Good Discussion, Good Dissection. More efficient than full FMEA when analyzing modifications. Essential tool for Mizen Boshi (pre-occurrence prevention). Requires knowledge of both old and new designs to identify concerns introduced by changes.