How to Work Out Savings for This GB Project?

As the first Green Belt project I intend taking up to increase productivity of fresh graduates joining IT company (specifically in the IBM Mainframe technology area). Some of the factors affecting productivity of newcomers are :

Lack of Technical Experience

Lack of Functional Knowledge/Business Application

A couple of CTQs emerging out of the QFD exercise is Ontime Delivery and Quality of the deliverables.

For the R0 form, I need to show Savings. In such an area as this one, should I be measuring productivity of the newcomer while keeping track of salary of the newcomers and work out savings ? Is there some other attribute from which I can work out savings ? Please guide me.

Thank you much in advance.

Uma MB.