According to the Project Management Professional (PMP) principles, successful project outcomes are heavily dependent on adequate requirements gathering at the beginning of the project. If the villagers could not access water six months after the completion of the borehole project, it suggests that the project requirements may not have been adequately defined or understood. This could include understanding the villagers' needs, the environment, and the sustainability of the project solution. The Cost Performance Index (CPI) and Schedule Performance Index (SPI) indicate the project's performance against budget and schedule, but they do not necessarily reflect whether the project outcomes meet the needs of the end-users. References: Project Management Professional (PMP) Certification Handbook, PMBOK Guide (6th Edition), Chapter 5: Project Scope Management, Section 5.2 Collect Requirements. Professional in Business Analysis (PMI-PBA) Handbook, Chapter 3: Elicitation and Collaboration.