Which method measures the cost efficiency of the work accomplished to date?

The method that measures the cost efficiency of the work accomplished to date is the Earned Value / Actual Cost. This metric is known as the Cost Performance Index (CPI), which is calculated by taking the value of the work that has actually been completed (Earned Value) and dividing it by the actual costs incurred for that work (Actual Cost).

The reason this method is significant is that it provides insight into how well a project is performing in terms of budget. A CPI greater than 1 indicates that the project is under budget, while a CPI less than 1 suggests that the project is over budget. By evaluating the cost efficiency of the work accomplished, project managers can make informed decisions about resource allocation, cost control, and forecasting the financial impacts of continuing the project.

This approach is particularly useful in project management because it combines measures of both progress and efficiency. It allows managers to assess the current state of the project against what was planned and helps identify any discrepancies early on, enabling appropriate corrective actions to be taken if necessary. Understanding this method is crucial for effective project oversight and successful delivery on budgetary targets.