When a new stakeholder joins the board of directors and is impacting the project's progress, it's crucial for the project manager to ensure that the stakeholder is fully informed about the project, its objectives, and its current status. By presenting the project to the stakeholder, the project manager can ensure that the stakeholder is aware of the project's goals, timelines, and deliverables, and that they understand the impact that their decisions may have on the project.
This will help the project manager to manage the stakeholder's expectations and ensure that their influence on the project is aligned with the project's goals.

A definition of ready (DoR) is a set of criteria or conditions that a product backlog item (PBI) must meet to be considered ready to be pulled into the sprint backlog1. A DoR ensures that the PBIs are clear, feasible, valuable, testable, and independent23. By creating a DoR for the backlog items, the project manager can avoid work overruns and ensure that the team can effectively tackle the tasks in the sprint2. References:
* Definition of Ready (DoR) [+ Key Components] | Atlassian
* Definition of Ready: Keeping Your Backlog in Check - Atlassian Community
* Ready or Not? Demystifying the Definition of Ready in Scrum