Although this article is a year old, it shows how an IT centric approach to ERP will lead to problems. ERP should be a process centric approach with the software being an enabler to good processes:
Hugger-Mugger fixes goofed open source ERP implementation
By Jan Stafford, Editor
05 Jul 2005 | SearchOpenSource.com
The low cost and easy accessibility associated with open source applications make them very attractive to some companies. But, as yoga and exercise products manufacturer Hugger-Mugger discovered, love at first sight led to a hastily implemented and ultimately botched implementation of Compiere’s open source ERP.