This type of change can only be driven from the top, the CEO down.
It's tough, recent surveys have shown only 19% succeed, why well its due to resistance shown normally by middle management / leaders in your business, why...? They have learnt behaviour (culture) thats based on years of following process and being held accountable. After all without governance the IT guys would be off playing with the latest toys and not delivering what the company actually needs. They have to be governed or controlled to ensure they provide value to the business right, avoid projects over running or budgets being exceeded?
Well no, not really... we are yet to come across an individual who doesn't want to provide value, improve their organisation, coming up with ideas on how to improve, trying to do the right thing. Just constrained by existing governance and structures that simply cant be changed.
The trouble is, learning these new behaviours and changing years of built up company culture is the real challenge. Leaders usually are not empowered to do this, it goes against all the structures and controls that exist in a large enterprise. It also goes against what they have learnt, applied and been successful with, it's a new way, that requires leaders to embrace a different approach.
This is why senior leaders, CEO's.. need to provide relevant empowerment, enable their staff to be entrepreneurial to inspire their teams and establish that hight trust no blame culture.