Earned value analysis is a project monitoring technique that compares the planned value, earned value, and actual cost of a project. Planned value refers to the budgeted cost of planned work, earned value is the budgeted cost of work actually completed, and actual cost is the real cost of completed work. Variances between these three values can identify if a project is over or under budget and ahead or behind schedule. Tracking variances over time allows project managers to determine the health of a project and take corrective actions if needed.