Normal Accidents and Root Cause Analysis

Normal Accidents book: http://press.princeton.edu/titles/6596.html

Systems are categorized by Interactions that are Simple vs Complex, and Tightly Coupled vs Loosely Coupled.

There are a few different versions of the quadrant: http://paei.wdfiles.com/local--files/perrow-charles-normal-accident-theory/PAEI_043_Perrow_Normal_Accident_Theory.gif https://www.flickr.com/photos/metanick/139214026/ http://media.peakprosperity.com/images/3-Perrow-from-Accidents-Normal.png

Douglas Squirrel talking about root-cause analysis: https://skillsmatter.com/skillscasts/1986-talk-by-squirrel

Notes on Squirrel's talk: http://www.markhneedham.com/blog/2011/12/10/the-5-whysroot-cause-analysis-douglas-squirrel/