The stakeholder engagement plan is a subsidiary plan of the project management plan that identifies the strategies and actions required to promote productive involvement of stakeholders in project decisions and execution. It is a dynamic document that should be updated throughout the project as stakeholder needs and expectations change. The project manager should explain to the key stakeholder that their needs will be updated in the stakeholder engagement plan and that their continued participation is important for the project success. References: PMBOK Guide, 7th edition, section 13.2.3.1; Professional in Business Analysis (PMI- PBA) Guide, 2nd edition, section 4.2.3.1.