Actual Cost of Work Performed (ACWP) is used in Earned Value Analysis

For a fuller understanding, this Wiki entry should be read in conjunction with BCWS and BCWP.

ACWP is the Actual cumulative cost of doing work, and is usually compared to the cost planned in the Base programme (BCWS). 

The total value of the activities are added up for each period and plotted cumulatively to give a profile on a graph.

Further info can be found at:

http://www.projectsplanning.com/Projects%5FPlanning/Terminology/Terminol...