I have been doing a bit of research over the last week to see what academics and researchers think the innovation process is.
There is lots of stuff on this relating to the private sector but relatively little that relates to the delivery of public services. But I have found two which might be helpful:
Source: Innovation: A roadmap for homeless agencies - npfSynergy - 2003
And this one from the Cabinet Office report by Geoff Mulgan and David Albury:
Source: INNOVATION IN THE PUBLIC SECTOR - [ver 1.9 October 2003] - Geoff Mulgan and David Albury