Your stakeholder register and matrix are an integral part of your project management plan. They should be aligned with other project documents, such as the project charter, the scope statement, the work breakdown structure, the schedule, the budget, the quality plan, the risk register, the communication plan, and the change management plan. For example, you can use your stakeholder register and matrix to define the project vision and objectives in the project charter and get stakeholders' buy-in and approval. Additionally, you can use them to identify project requirements in the scope statement and ensure they meet stakeholders' needs and expectations. You can also break down project work into manageable tasks and assign them to responsible team members and stakeholders in the work breakdown structure. Furthermore, you can estimate time, cost, and resources needed to complete tasks in the schedule and budget. Moreover, you can establish quality standards in the quality plan and involve stakeholders in quality assurance and control processes. Additionally, you can identify potential risks in the risk register and plan how to respond with stakeholders' input. Finally, you can define communication goals in the communication plan tailored to stakeholders' preferences. Lastly, you can define a change management process to manage changes in scope, schedule, budget, quality or risks with stakeholders' informed consultation.