Many IT leaders are trying do the right thing and implement change in their organization in areas like enterprise architecture, business process reengineering, service oriented architectures, and many other bold initiatives. Where they often go wrong is that they try to implement these initiatives across the entire organization right out of the gates.
As we all know, large-scale change is extremely challenging and even intimidating. The larger the scope, the longer it will take to implement. The longer it takes to implement, the more likely it will fail.
Source: CIO, http://advice.cio.com