7. Deploy the ERP one module at a time (not all at once). “For example, implement your accounting applications first, such as your general ledger, payables and receivables,” says Allan Alutalu, a project manager for Fujitsu Consulting. “Once those modules are up and running, implement your other modules, such as HR and payroll. Then implement your satellite modules and other add-ons. Many organizations have failed [in] their ERP implementations by using the big bang approach and attempting to convert all their systems to the ERP all at once – a big, costly mistake.”