Re: Rule 1 for SAP
This is true for any ERP, though. A new ERP with new processes and functionality is a business-transformative event. It's not like installing the latest version of Word.
Many years ago, I worked on a site where the ERP system (Dynamics AX 4) had been extensively modified to run like its predecessor (SAGE Line 100). It was, predictably, full of bugs and awkward work-arounds. Naturally, the users hated this Dynamics AX 4 thing.