Dear Sunil,
To start a Six Sigma program in any process, function, or department, first, you have to check the trends of process metrics related to effectiveness, such as training effectiveness and training feedback from participants. If there is no scope for improvement, then you should check the metrics related to the efficiency of this process, such as training costs.
However, as per my suggestion, you should initiate the Six Sigma project only when a pain area exists in any process. Don't start a Six Sigma project just to showcase the existence of Six Sigma! The most important thing is the buy-in from the process owner.
Vivek