Project Management CPI is an acronym that stands for Cost Performance Index. It’s a measure of performance used to evaluate the cost-effectiveness of a project. In simple terms, it shows how much money was spent on the project compared with how much work was completed. It’s a great tool for project managers to use when trying to determine the best approach for any given task, as it provides a clear understanding of project costs vs. profit. Used appropriately, it helps maximize efficiency and minimize waste – resulting in better outcomes for everyone involved.