Here is an excellent review of several change initiative studies. It cites and reviews various studies, models, and theories of change intiatives.
Organisational Change Management: A Critical Review
RUNE TODNEM BY
Queen Margaret University College, Edinburgh, UK
(The Reference section provides numerous citations/sources of change initiative studies such as: Nelson, L. (2003) ‘A case study in organizational change: implications for theory’,
The Learning Organization,10(1), pp. 18–30)