What are some ways leaders can maintain a high level of engagement when planning and implementing organizational change? How can ineffective executive leadership hinder the change process?

The diversity of practical advice for managing change can be organized into five
primary activities. When discussing these activities, all individuals of an
organization have to be motivated and committed to change even though getting
movement on the desired change can be difficult. In the absence of vision,
change is likely to be disorganized and diffuse. Without the support of
influential individuals and groups, change may be blocked and possibly
sabotaged. Unless the transition process is managed carefully, the organization
will have difficulty functioning while moving from the current state to the
future. Without efforts to sustain momentum for change, the organization will
have problems carrying the changes through to completion. Thus, all five
activities must be managed effectively to realize success.

What are some ways leaders can maintain a high level of engagement when planning and implementing organizational change? How can ineffective executive leadership hinder the change process?