Hello Dinesh,
You can read the documentation, for this BAdi, in the Implementation Guide or in the BAdi Definition.
For the BAdi Definition: execute t-code SE18: BAdi name= QE_SAVE, choose DISPLAY. Follow menu path: Utilities->Documenation->Display.
For the Implementation guide, the menu path is: t-code SPRO
SAP Customizing Implementation Guide->Quality Management->Environment->Tools->Business Add-ins->Quality Inspection->Business Add-in When Saving Results in Recording.
If you need help in learning how to implement a BAdi, there are many blogs, such as:
Regards,
Kim