Earned Value (EV) is an effective project management tool that allows businesses to measure how well a project is performing by comparing the actual cost of the project against the estimated costs. It is a method used to track the progress of a project, and it calculates the cost progress ratio (CpI) to compare the current performance with the original estimate. CpI Earned Value is a more advanced version of traditional earned value analysis which incorporates other metrics such as time, budget, and scope. This makes it easier for managers to identify problems early on and make adjustments where necessary. With CpI Earned Value, businesses can measure performance objectively and forecast outcomes accurately.