According to the PMBOK® Guide, the Develop Project Charter process is the process of developing a document that formally authorizes the existence of a project and provides the project manager with the authority to apply organizational resources to project activities.

Authority and Empowerment: Without a signed Project Charter, a project manager may exist in name, but they do not have the formal power to utilize company funds, staff, or equipment. The charter establishes a partnership between the performing and requesting organizations.

The Project Sponsor: The charter is typically issued by a project initiator or sponsor who is at a level appropriate to procure funding and commit resources to the project.

Key Benefits: The key benefits of this process are that it provides a direct link between the project and the strategic objectives of the organization, creates a formal record of the project, and shows the organizational commitment to the project.

Comparison with other options:

A. Define Activities: This is a planning process in Schedule Management that identifies the specific actions to be performed to produce project deliverables. It assumes the project is already authorized.

B. Direct and Manage Project Work: This is an execution process. It is the act of using the authority and resources provided by the charter to perform the work, but it is not the process that grants that authority.

C. Develop Project Management Plan: This process defines, prepares, and coordinates all plan components. While it guides how resources are managed, the fundamental authority to even begin this planning process comes from the Project Charter.