D7 (Prevent Recurrence)

8D discipline that extends learning beyond the immediate problem to prevent similar issues elsewhere. Asks 'Where else could this happen?' and applies lessons to similar products, processes, or locations before problems occur. Includes updating systems like FMEA, control plans, design standards, and training materials. Reviews whether similar problems happened in the past and weren't adequately addressed. Goes beyond A3 Follow-up by explicitly requiring proactive prevention in other areas (similar to Yokoten).