When a significant regulatory feature is missing in the project backlog, it is essential to engage stakeholders to discuss the impact of adding this feature. This aligns with the PMBOKGuide's emphasis on stakeholder engagement and the importance of communication with stakeholders when project changes occur. The PMBOKGuide suggests that project managers should continuously engage stakeholders to understand their needs and expectations, address issues as they occur, and foster appropriate stakeholder engagement in project decisions and activities. : PMBOKGuide - Seventh Edition1 The PMI Guide to Business Analysis2