In the context of agile project management, when a team member is unavailable and it significantly impacts the deliverable, the project manager should perform an impact analysis to understand the extent of the impact on the project. The next step is to readjust the project schedule accordingly. This may involve re-estimating the remaining work, adjusting the scope, or re-prioritizing the backlog items. Once these adjustments are made, it is crucial to communicate the changes to the customer to set realistic expectations and maintain transparency. This approach aligns with the agile principle of responding to change over following a plan and ensures that the project continues to move forward in a controlled and informed manner. References: The answer and explanation are based on the principles found within the PMBOKGuide and the Agile Practice Guide, which are part of the reference materials for the PMP certification12. Additionally, the Professional in Business Analysis (PMI-PBA) reference materials support the importance of stakeholder engagement and communication, which are critical when there are significant changes in a project3.