The function of a project management information system (PMIS) is to support project planning, execution, and monitoring by collecting and analyzing project-related data. A PMIS provides tools for scheduling, resource allocation, budgeting, and reporting, which helps managers make informed decisions. It enhances communication among team members, stakeholders, and clients, ensuring everyone is aligned with project objectives. By centralizing information and streamlining processes, a PMIS fosters greater efficiency, accountability, and transparency throughout the project lifecycle. Ultimately, it contributes to the successful delivery of projects on time and within budget.