Updating a risk register with assessment results for a key project must primarily capture action plans to address risk scenarios requiring treatment. Risk Register Purpose: Documentation of Risks:The risk register is a central repository for all identified risks and their respective treatment plans. It ensures that all risks are documented, tracked, and managed throughout the project lifecycle. Action Plans:It is crucial to document action plans for risks that require treatment. This ensures that there are clear strategies in place to mitigate or manage these risks. Importance of Action Plans: Mitigation and Management:Action plans detail the steps necessary to mitigate identified risks, providing a clear path for risk management. This is vital for ensuring that risks do not negatively impact the project. Accountability and Tracking:Including action plans in the risk register assigns responsibility and timelines for risk treatment, which is essential for accountability and tracking progress. References: According to ISACA's guidelines, a comprehensive risk register should include action plans for addressing risk scenarios. This ensures that all identified risks are managed effectively and that appropriate actions are taken in a timely manner.