As I have written about many times the following standard scenarios are always at play with your change initiatives both before you begin them, and during the implementation:
1) People who feel changes will benefit them embrace change.
2) People feeling unsure about whether changes will benefit them sit on the fence.
3) People who feel change won't benefit them resist change.
The key to each scenario is how people feel about change.
To guarantee you'll succeed in the change/s you lead I highly recommend addressing people's feelings first and always. By doing so you'll avoid the fate described brilliantly by Jack Welch.