Mizen Boshi

Japanese term meaning 'before-the-fact prevention' or pre-occurrence prevention. Philosophy and practice of anticipating and preventing problems before they occur by analyzing new designs, changes, and potential failure modes. Goes beyond reactive problem-solving to proactive quality built into design and development. Involves analyzing what could go wrong before production starts, using tools like FMEA and DRBFM. Different from inspection-based quality (finding problems after they occur) by preventing problems from being designed in. More comprehensive than just preventing recurrence—aims to prevent first occurrence through systematic anticipation and design robustness.