The size of the project will determine the level of detail required. For a small project you may only produce a schedule however for a large project, you may need to produce a full communications plan.
Full details of how to create a communications plan are contained in the Communications Planning User Guide below. They explain the use of the templates and provide examples.
If the project is going to have a major impact on the people, and how they work, a Change Management program should be considered. Whilst it is touched on in the User Guide, it is outside the scope of this process to provide guidance on how to set up a Change Management program.