1、附录 259 1.外文原文 THE EARNED VALUE CONCEPT The earned value concept (sometimes also called achieved value) compares several measures to obtain an overall picture of project status. The following are the three primary data requirements: BCWS: Budgeted Cost of Work Scheduled: This measure, also called the
2、 project plan, is developed at the outset of the project as it involves assigning to activities the amount budgeted (estimated) for every activity. Knowing the project schedule, it is possible to determine the amount of money budgeted relative to time. This is essentially the same as developing the
3、cumulative cost curve discussed earlier. BCWP: Budgeted Cost of Work Performed: This is the earned value as it indicates what the budgeted costs are for the work that has actually been performed to date. Note that this represents the periodic worth of the work that is actually performed, based on th
4、e initial estimate, and has nothing to do with the actual costs incurred in performing the work. It requires making an assessment of the amount of work completed (time schedule) to date and then applying the appropriate budgeted amounts for this work. BAC: Budgeted Cost at Completion: This is the original cost estimate of the total cost of construction. It is ideally the total estimated cost to complete a project. EAC: Estimated Cost at Completion: This is the forecast of the total actual costs
