dfrnce b/w roll out,upgrade,migration and implementation
Roll -out Project:
Extending the business functionality from corporate office to its branch office. Example: You have main office in USA and you implemented SAP. Also you have branch in India and want to implement in India. When implementing SAP in India office( having same company in corporate level and assigning a company code for India to the same company), you can say it’s a roll out project.
SAP Upgrade is nothing but upgrading the software with a superior version which has got more advantages when compared to the earlier version. Consultants are to go through transactions SPAU/SPDD to compare the old and new version of the change and finally need to activate the relevant one. Some times might need to work on SAP notes.
SAP Implementation is the whole of processes that defines a complete method to
implement SAP software in an organization from Legacy System. It is based on best practices and case studies from various sources and presents a collection of processes and products that make up a complete implementation method to allow any organization to plan ,redesign and execute the implementation of SAP (ERP) software. The SAP implementation process is made up out of Five main phases, i.e. the project preparation where a vision of the future-state of the SAP solution is being created, a sizing and blueprinting phase where the solution stack is created and training is being performed, a functional development phase and finally a final preparation phase, when the last tests are being performed before the actual go live & then support.