how to create cfg mapping file for RQM import
One answer

Gagan,
I suggest starting with the following article because it is well prepared and documented
Most of the users were able to prepare their mappings based on this article (of course it depends on the complexity).
Comments

Thanks @Bartosz
Can you also help to for below Question
https://jazz.net/forum/questions/278311/what-is-the-use-of-executionworkitem-in-cfg-file-for-excel-importer