Hello Mohan,
My suggestion would be to 'Implement' and 'Demonstrate' approach rather than using a 'Concept', 'Implement' and 'Demonstrate' approach. There are misconceptions about Six Sigma in the service industry and management often finds it difficult to engage.
If you need help in selecting a project, then you can drop an email to me and I would be able to help.
We are a KPO organization too and there are different ways six sigma can assist an organization.
Regards,
Anees Merchant