Study of nearly 1,500 IT Projects found an average 27% cost overrun, with a staggering 1 in 6 projects overrunning by more than 200% initial cost estimate. The article describes horror stories at Levi Strauss, Hershey’s and Airbus and the business impact of these IT Project disasters.

http://hbr.org/2011/09/why-your-it-project-may-be-riskier-than-you-think/ar/1