The November 2012 HBR contains an article by John Kotter that provides some enlightening observations and learnings for change practitioners.

Kotter, whose original change management model is now pervasively used in many organisations, has spent the last 15 years working with organisations to implement change.  As a result, he has now added to his original thinking.  Kotter talks about the limitations of driving change through usual management driven organisation hierarchies and introduces the notion of a complementary strategy network to develop and drive strategic change initiatives in organisations.  We have been working with some of these ideas in the work we do with clients and will keep you posted of progress.