The PMBOK Guide emphasizes the importance of identifying all stakeholders and understanding their influence and impact on the project. In this scenario, the environmental activist group, being concerned with the project's proximity to a nature reserve, qualifies as a stakeholder. Their concerns could impact project delivery, public perception, and regulatory compliance. Therefore, the project manager should add the group to the stakeholder list and analyze their potential impact as part of the stakeholder engagement process12. This aligns with the principles of stakeholder management and engagement, which are crucial for project success and are also reflected in the Professional in Business Analysis (PBA) reference materials, where managing stakeholder expectations and engagement is a key aspect of business analysis34.
This response is informed by the PMBOK Guide's approach to stakeholder management12, as well as the practices outlined in the Professional in Business Analysis reference materials regarding stakeholder engagement and management34.