SAP Software Change Registration (SSCR) is used to manage all changes by the customer to the SAP source code and SAP Dictionary objects. Everytime you register SAP issues a 20-digit registration key, which is issued for each object and SAP provides no guarantee for these types of modifications.

Advantages:

1. This supports rapid error location and correction
2. Prevents unintentional system modification
3. Ensures system stability
4. Overview of all the modifications facilitates the processing of release upgrades.