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2024-09-03 22:41本頁(yè)面
【正文】 nowing the project schedule, it is possible to determine the amount of money budgeted relative to time. This is essentially the same as developing the 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 the 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 pleted (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 plete a project.EAC: Estimated Cost at Completion: This is the forecast of the total actual costs required to plete a project based on performance to date and estimates of future conditions.ACWP: Actual Cost of Work Performed: This is the measure that brings together the monitoring of both time schedule (work performed) and cost records (actual cost). It gives the actual costs to date. (Note that ACWS, Actual Cost of Work Scheduled, is not a ponent of the system, because if the work scheduled has not yet been performed, it is impossible to determine its actual cost!)Comparing the first (BCES) and last (ACWP) values to the earned value (BCWP) gives us an indication of “variances” from the expected.SV: Schedule Variances。 BCWPBCWS: Subtracting the budgeted cost of work scheduled from the budgeted cost of work performed provides an indication of schedule deviance in terms of dollars of work. The cost side of the system remains constant (using budgeted cost figures) so the difference between the two amounts must be due to schedule deviations alone .A negative value indicates that the project is behind schedule as the “value” of work performed is less than that schedule. This is shown graphically in Figure 10 . that the schedule deviance is presented in terms of dollars, while in reality this is an indication of project status in terms of scheduled time.SV=BCWPBCWS (SV0: ahead of schedule, SV0: behind schedule)CV: Cost Variance: BCWP ACWP: The difference between the budgeted costs of work performed clearly indicates the status of the project in terms of cost. The work performed provides the mon unit of parison. A negative CV indicates the project is over budget as the actual costs exceed the budgeted cost
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