Lack of communication leads to breakdown in trust, confusion, cynicism and frighteningly quickly, to ugly political and internal in-fighting, as Covey found out to his cost. Work fast Make, announce and implement people decisions early. This is arguably the best chance to minimize resistance, confusion and cynicism. For example, spill and fill positions as rapidly and as fairly as can be done, implement changes in key areas such as pay and incentives from day 1, take the hard decisions up front. These principles are communication, consistency of acts, words and practices, and commitment of time and resources.
People are the key to any change success.
Reliance on fads or theories is no substitute for real life experience and for doing what is best for your unique organisation.