Progress effective method is earned value analysis of the project, the cost performance state evaluation, calculate the actual workload spent on a project.
Parameters - Input:
| BCWS | The total estimated cost so far. It said that "so far as originally planned cost?" Or "until the date of completion of the work should be how much?" |
| ACWP | So far as the actual cost of the work is completed. It represents the "actual costs up to the date of the completion of the work. "Explained" to that date until the actual amount of money spent. " |
| BCWP | Budgeted cost of work completed so far has been done originally expected cost of the work. It said that "up to that date as how much work?" |
| LAC | Cost estimates of the project plan. It is estimated the total cost of the project is completed. |
| TAC | The completion of the project plan estimates the time. |
Parameters - Output:
| SV: Progress difference | SV = BCWP-BCWS | If this value is 0, indicating that the normal progress of the project. If this value is negative, it represents the project behind schedule. If this value is positive, it indicates the project is ahead of schedule. |
| CV: cost differences | CV = BCWP-ACWP | If this value is 0, which means make budget. If this value is negative, it represents the project within budget. If this value is positive, it represents the project under budget. |
| SPI: Progress performance indicators | SPI = BCWP / BCWS | If this value is = 1, according to plan. If this value is <1, indicating behind schedule. If this value is> 1, indicating the progress in advance. |
| CPI: cost effectiveness index | CPI = BCWP / ACWP | If this value is = 1, according to plan. If this value is <1, represents the project within budget. If this value is> 1, indicating that the project under budget. |
| EAC: predict the cost of completion of the project | EAC=BAC/CPI | |
| VAC: completion of the project cost difference | VAC=BAC-EAC | |
| SAC: predict time completion of the project | SAC=TAC/SPI | |
| TCPI: cost-effectiveness index unfinished | TCPI = work remaining / residual cost |
Schematic:
Case:
| mission name | Program costs (million) | Actual costs (million) | Percent Complete |
| A | 10 | 9 | 80% |
| B | 7 | 6 | 100% |
| C | 8 | 7 | 80% |
| D | 5 | 5 | 100% |
Seeking BCWP, CV, SV, CPI, SPI, according to the current final cost and schedule implementation of the project and so on.
问题关键在于求出BCWP，后面一切便可迎刃而解。按照问题描述，计划成本为BCWS，实际成本为ACPW。对于问如果按照这样的进度继续执行下去的问题，算出来CPI和SPI则相当于一个速度，总成本或总计划时间处于CPI或SPI即可得到。
BCWP的求法：
0/100：如果项目没有完成100%，则统统按照进度为0计算，最保守的一种算法。
50/50：如果项目没开始则是0，无论进度为多少，只要不是100%则是50%，如果完成则按照100%；
经验加权：按照完成百分比乘以总进度。
如果是0/100:
| 任务名称 | BCWS | ACWP | BCWP |
| A | 10 | 9 | 0 |
| B | 7 | 6 | 7 |
| C | 8 | 7 | 0 |
| D | 5 | 5 | 5 |
如果是50/50:
| 任务名称 | BCWS | ACWP | BCWP |
| A | 10 | 9 | 5 |
| B | 7 | 6 | 7 |
| C | 8 | 7 | 4 |
| D | 5 | 5 | 5 |
如果是经验加权:
| 任务名称 | BCWS | ACWP | BCWP |
| A | 10 | 9 | 8 |
| B | 7 | 6 | 7 |
| C | 8 | 7 | 6.4 |
| D | 5 | 5 | 5 |
