According to the PMBOK® Guide, the process of Develop Project Management Plan involves defining, preparing, and coordinating all plan components. To develop the technical details and integrate them into a cohesive whole, the following tools and techniques are utilized:

Project Management Methodology: This refers to a defined system of practices, techniques, procedures, and rules used by those who work in a discipline. In the context of plan development, the methodology provides the framework and technical approach for how the project will be managed and controlled. It dictates how various technical details—such as lifecycle phases, change control procedures, and communication protocols—are structured within the plan.

Expert Judgment: While Expert Judgment (Choice A) is used to tailor the process and provide technical expertise, the methodology is the overarching tool that specifically organizes the development of those technical details into the formal document.

Project Management Information System (PMIS): Choice C is a tool used for providing access to IT software tools (like scheduling or configuration management) and for the collection/distribution of information, but it is not the primary tool for developing the technical logic or strategy of the plan itself.

Project Selection Methods: Choice D is used during the initiating phase or at the portfolio level to determine which projects should be authorized, long before the technical details of a project management plan are developed.

The methodology ensures that the technical details are consistent with organizational standards and the specific needs of the project ' s complexity and industry requirements.