Agile Admin, The (2011) What is DevOps? http://theagileadmin.com/what-is-devops/. Accessed 29 April 2014.
A very straightforward introduction to this topic, with quite a few references for further exploration.
Ammerman, M. (1998) The root cause analysis handbook. Boca Raton, USA: CRC Press.
Andersen, B. and Fagerhaug, T. (2006) Root cause analysis: simplified tools and techniques. Milwaukee, USA: Quality Press.
Okes, D. (2009) Root cause analysis: the core of problem-solving and corrective action. Milwaukee, USA: Quality Press.
Three books from the quality movement. Each gives a different view of problem management from a non-IT perspective. I like the Okes book best, but Ammerman contains good information about causal factor ...