Many companies implement MRP/ERP systems but are disappointed by the results, and many do not realize the return on investment (ROI) that was projected for the system.
Do some research and post an example of either a successful or failed ERP implementation at a major company. Let us know what the major causes were for the success or failure of the system. If you have worked for a company that has an ERP system, you can post about that effectiveness of that particular ERP system.