What tool defines stakeholder responsibilities?

The correct choice is the RACI matrix, which effectively defines stakeholder responsibilities within a project. The RACI matrix is a tool used to outline the roles and responsibilities of stakeholders for each task or deliverable in a project. It categorizes stakeholders as Responsible, Accountable, Consulted, or Informed, providing clarity on who is responsible for specific actions, who has the authority for decision-making, who needs to be consulted during the process, and who should be kept informed of progress.

In terms of the context of this question, while the Work Breakdown Structure (WBS) and Organizational Breakdown Structure (OBS) are both valuable in project management, they serve different purposes. The WBS is a hierarchical decomposition of the total scope of work to accomplish the project objectives and create the deliverables, focusing primarily on deliverables. The OBS, on the other hand, organizes the project into a structure representing the reporting relationships and responsibilities of team members but does not explicitly define who is responsible for each task.

The Responsibility Assignment Matrix (RAM), while related and useful in assigning responsibilities, is not as commonly referenced by the acronym RACI and often can lead to confusion with other methodologies for assigning roles, thus emphasizing the clarity provided by the RACI matrix.

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