Why is the NDIS being rolled out the way it is?

Initially, the NDIS was rolled out in small trial sites. This allowed the NDIS to test different areas and age groups, and investigate how the scheme was working. This process allowed the NDIS to fix problems prior to the implementation of the full scheme.

Now that the NDIS is into the full scheme, it's rolling out according to the agreements made within different state and territory governments.