Have you ever been part of a root cause analysis that didn't seem useful, or, worse yet, didn't really get to any of the true root causes?  Healthcare colleagues, the British Medical Journal of Quality & Safety recently highlighted your pain exactly.  Look here.  RCAs are incredibly useful tools that need to be performed just so, and they are not without their weaknesses.  For advanced tips on the use of RCAs (specifically the fishbone/Ishikawa diagram you typically build during an RCA), look here.