("CV") The difference between the budgeted and actual cost of work performed. [D00427] WST Either Any difference between the estimate cost of an activity and the actual cost of that activity, or In earned value, BCWP less ACWP. [D00428] PMK96 The difference between BCWP and ACWP and shows how actual expenditure compares with the budget. This can be shown as a numeric difference, where positive values indicate cost s running under budget and negative values indicate cost overrun s. Can also be expressed by a percentage value such as: CV(%) = ( BCWP- ACWP) x 100 / BCWP. [D02248] PMST