Project Management Process Groups:
The Processes are grouped together in to five process groups. The Logical grouping of project management processes to achieve specific project objectives are called Project Management Process Groups. Below are the five process groups:

Initiating Process group: The processes part of initiating process group are performed at the time of new project or new phase of existing project.
Planning Process group: The processes part of planning process groups helps in defining the plan for the project like defining scope, planning for schedule, cost, procurement, communications etc. This helps in defining the course for the project to achieve its objectives.
Executing Process group: The processes in executing process group is performed to complete the defined work as per plan to satisfy the project stakeholders.
Monitoring & Controlling Process group: As part of monitoring & controlling process group, the performance of project is tracked, monitored, reviewed & controlled. The variation from plan is derived & identify what changes are required to bring back the project on track.
Closing Process group: The processes part of closing process group are done at the time of closing the project to close the projectformally.
1. Develop project charter:what is project charter in project management?

A project charter is the document that states a project exists and provides the project manager written authority to begin project work.

A Project Charter is a document that describes the purpose of a project and its scope, it legally authorizes the beginning of the project.It provides a preliminary delineation of roles and responsibilities, outlines the project objectives, identifies the main stakeholders, and defines the authority of the project manager. It serves as a reference of authority for the future of the project.

A project charter should:
Contain the essence of the project.Provide a shared understanding of the project.Act as a contract between the project sponsor, key stakeholders and the project team.

Develop project charter is the process of developing the project charter document that formally authorize the existence of the project and the project manager is given the authority to use organizational resources to project activities. Develop project charter is part of initiating process groups.

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