Difference Between Implementation, Support, Upgrade, Rollout in SAP

1. Implementation
Customer wants to install SAP which Includes different modules of SAP like MM/SD/FI/CO/PP etc. This is implementation project. Here one needs to integrate several modules, migrate data from Legacy system to SAP system. Need to prepare interfaces/RFC's to interact with 3rd party systems. In this we can define a specific Business process of an Organization.

2. Support
In Support any Customer has already installed SAP & now he wants to give the work of maintaining those systems. This is support project.

3. Upgrade
Upgrade is that in which any Customer has SAP Version 4.6b and wants to update his version i.e. Version 4.7. This is upgrade project

4. Rollouts
In Rollout project we can't implement any full or define any Business process. This includes when a Customer has Installed/upgraded his version & wants to rollout country specific changes.
This is rollout project. for example: we have implemented a project for a single plant specific and want to extend this to another plant specific.