Explanation
The project manager should establish a clear RACI matrix first in the project governance structure to address the governance issue during the project execution phase. According to the PMBOK Guide, a RACI matrix is a tool that defines the roles and responsibilities of project team members and other stakeholders for each project activity or deliverable[1]. A RACI matrix uses four categories to assign the level of involvement for each stakeholder: responsible, accountable, consult, and inform[1]. By creating a clear RACI matrix, the project manager can avoid role ambiguity and confusion, and ensure that each team member knows who to report to and who to communicate with for each project task. This way, the project manager can improve the team performance and satisfaction, and resolve the governance issue. The other options are not the first things that the project manager should establish in the project governance structure, as they do not directly address the root cause of the issue.
A risk management and issues resolution plan is a document that describes how the project will identify, analyze, respond to, and monitor risks and issues[1]. It does not define the roles and responsibilities of the project team members and other stakeholders.
A resource management and conflict resolution plan is a document that describes how the project will acquire, develop, manage, and release the human and physical resources needed for the project[1]. It also includes the methods and techniques for resolving conflicts among the project team members and other stakeholders[1]. It does not define the roles and responsibilities of the project team members and other stakeholders.
A clear project work breakdown structure (WBS) and timeline is a graphical representation of the project scope and schedule, showing the hierarchical decomposition of the project deliverables and activities, and the estimated duration and dependencies of each activity[1]. It does not define the roles and responsibilities of the project team members and other stakeholders.