Some organizations may also include a sixth process group:

Evaluating: In this process group, the project is evaluated against its original objectives to determine if it was successful and to identify opportunities for improvement.

Effective project management requires careful planning and execution at each stage of the project management process. Project managers must be skilled at managing project scope, time, cost, quality, resources, and risks to ensure that the project is completed successfully. They must also be able to communicate effectively with stakeholders and manage their expectations throughout the project lifecycle.