According to the PMBOK Guide, the communications management plan is a component of the project management plan that describes how project communications will be planned, structured, implemented, and monitored for effectiveness. It also defines the communication methods, formats, frequency, and escalation process for different types of communication. In this scenario, the project manager should update the communications management plan to include informal requests from the executive, such as the dashboard, and specify how they will be handled by the project team. This way, the project manager can ensure that the communication expectations of the executive are met, and the project team is aware of their roles and responsibilities in providing the requested information. Updating the stakeholder engagement assessment matrix, asking the team member to develop a dashboard, or telling the team member to route the request through the project manager are not effective options, as they do not address the root cause of the communication issue, which is the lack of a clear and comprehensive communications management plan. References: PMBOK Guide, 7th edition, pages 123-124, 127-128.