Depending on the size and complexity, Project Managers may need to create subsidiary plans to support large projects.
Those supporting plans can include:
Communication Plan - Large projects may require a communication plan so the right information is messaged to the appropriate parties at the right moment. The plan would identify all parties who need to know about the project, and what it is each party needs/wants to know. The plan should also determine the best way and best format to communicate with each party.
Scope Management Plan - Complex projects may require a Scope Management Plan that provides guidelines on how to identify what is required to complete the project, and what work should not be included as part of the project. The plan should define how project scope will be identified, validated, documented and handled by Project Managers. The plan should also define how to manage changes (change control) to the project’s scope.
Schedule Management Plan - Project teams that are anticipating schedule changes should create a schedule management plan that defines how they will be handled. The schedule management plan should define the control process for the project including changes that are introduced through the change management processes or through time limits.