Machievelli noted that the introduction of a new system was one of the hardest things to accomplish.
He didn't know about computers or work flows but he understood human nature. He observed that the old system has many beneficiaries, while the proposed system has none, at least not until it is in place.
Change is hard to accept. Even when you let people know what is going on they tend to imagine the worst. People are smart and they know management doesn't usually waste a lot of time communicating the good news, so when management starts a communication campaign they are immediately on guard.
Consencis promotes proven and effective techniques to help your organization introduce and benefit from change.