According to the PMBOK® Guide (6th Edition), the Communications Management Plan is the primary document used to define how project communications will be planned, structured, implemented, and monitored.

When a project manager needs to determine the specific level of detail, format, frequency, and audience for a status report, they refer to this plan. It acts as the " playbook " for all information exchange within the project and specifically addresses:

Stakeholder communication requirements: Identifying who needs what information.

Information to be communicated: Including the language, format, content, and level of detail.

Reason for the distribution: Why that specific information is being shared with that specific stakeholder.

Timeframe and frequency: How often the reports should be sent.

Analysis of Distractors:

A (Organizational process assets - OPAs): While OPAs might provide the template for a status report or historical data on how reports were handled in the past, they do not dictate the specific requirements for a new stakeholder on the current project. The specific requirements are tailored and stored in the project ' s management plans.

B (Change management plan): This document describes how changes to the project (scope, schedule, or budget) will be formally authorized and incorporated. It does not govern the distribution or detail level of routine status reports.

C (Resource management plan): This plan provides guidance on how project resources (human and physical) should be categorized, allocated, and managed. It does not contain instructions for stakeholder communication or reporting depth.