Introduction
Problem (one line): Scrap bins erase evidence. Most repeat failures persist because the failed part was cleaned, mixed, or discarded before anyone learned why it failed.
Why this keeps happening (mechanism): Cleaning and mixing parts destroy fracture origins, transfer films, and fit relationships. Without those clues, analysis degrades into opinions and “no-cause-found” reports.
Target State (what good looks like)
Every failed part arrives with intact fracture faces, preserved residues, mating parts kept together, orientation marks, recent trends/alarms, and a signed chain of custody—one page of facts—no speculation.


