The problem owners should review activities of the action team members and plan how to gradually involve all members of the unit in the plan.
Each of the team members now have a chance to understand what the endeavor will involve. Informal sessions to discuss the plan and to become comfortable with it must be planned, including a grand launch to win buy-in from stakeholders.
Help each team member to be comfortable with their activities. Handhold and enhance links between different departments. Studies show that turf protection prevents efficient implementation. Organizational energy should be carefully focused on the task.