Well we all know how important requirements traceability is for software engineering.
I just found a curious example of traceability that has a lot to do with business processes and how the financial market does operate. I came to it from watching a video on foreclosures from ABC news.
The written material is here. It is an example of the lack of a proper process for keeping traceability. A side effect: for some people, it is becoming a possible relief, or at least a way of postponing losing their homes.