Upon being assigned to a project, especially one as critical as providing water access to a community, the project manager's next step should be to start project planning and develop the project management plan. This is in accordance with the PMBOKGuide's recommended process, which emphasizes the importance of planning in the project management life cycle. The planning phase involves defining the project scope, objectives, and procedures, which are crucial for the successful delivery of the project outcomes. It ensures that all aspects of the project are methodically approached and that the project's goals are aligned with the community's needs.
References:
* PMBOKGuide - Seventh Edition
* The PMI Guide to Business Analysis
* Standards & Publications by Project Management Institute