According to the Project Management Body of Knowledge (PMBOK), effective stakeholder engagement is crucial for the success of a project. In this scenario, the local community is a key stakeholder group due to the potential impact of the factory construction project. Therefore, the project manager should build channels to extend communication efforts to the local community. This could involve holding community meetings, distributing newsletters, or setting up a project website where updates and information can be shared. This approach ensures that the community is informed and has the opportunity to provide input, which can help to mitigate potential risks and address concerns. References: PMBOK Guide, 6th Edition, Section 13: Stakeholder Management.