Changing
the SAP Standard (BC) 
The SAP System provides a comprehensive infrastructure for business computing. To streamline business processes, however, you may be required to make modifications to the standard. You can enhance, modify or reduce the functions provided for a specific environment.
As of
release 7.0 of the SAP NetWeaver Application Server ABAP (SAP NetWeaver
2004s), a new enhancement concept exists in the ABAP Workbench (
Enhancement
Framework), which helps to integrate various concepts for the modification
and enhancement of development objects, and which is intended to gradually
replace the previous concepts.
When making changes to the SAP standard, you must first determine which type of modification best suits your needs. There are several ways of how you can modify the standard system:
ABAP Workbench tools are used to modify and enhance the system, and for customer development as well. Customizing and most Personalization take place in the context of the AcceleratedSAP standard implementation method.
For information about the modification levels see: