How do you turn a $100 million cost blowout into a $10 million saving? If you're the NSW government, focus on the positives.

The state government has been on a drive to slash $750 million in "red tape"; an ambitious target It claims to have exceeded comfortably.

But questions are being asked about how it arrived at some of these "savings".

In particular, the government's claimed savings from a major overhaul of the education department's IT system, Learning Management and Business Reform, are coming under question.