case study
The concrete case to learn from is called "A Tale of Two Stories".
It documents how there is always a first story and a second story to every
accident--the first story being shallow and tidy; the second much deeper
and more interesting, but also messier. Learning from these second stories
is more valuable and gives you greater opportunity to foresee patterns and
problems in the future, as you will read below.
A Tale of Two Stories
(.pdf, acrobat reader required)