The five process groups are:
- Monitoring & Controlling
- Project Integration Management
- Project Scope Management
- Project Time Management
- Project Cost Management
- Project Quality Management
- Project Human Resources Management
- Project Communication Management
- Project Risk Management
- Project Procurement Management
Processes performed to define a new project or a new phase of an existing project.
Processes required to establish the scope of the project, refine the objectives and define the course of action required to attain the objectives of the project.
Processes performed to complete the work defined in project management plan to satisfy the project specifications.
Monitoring & Controlling:
Processes required to track, review and regulate the progress and performance of the project.
Process performed to finalize all activities across all process groups to formally close the project or phase.
Reference: A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Fourth Edition