Table 3 Estimate at completion calculations.
From: Comparative analysis of earned value management techniques in construction projects
Method | Metric | Definition | Formula |
|---|---|---|---|
Earned schedule method | Earned schedule (ES) | The duration of time that a project merits based on its current progress | \(ES=t+\frac{EV-{PV}_{t}}{{PV}_{t+1}-{PV}_{t}}\) |
\({EAC}_{1}\) | Estimate at completion when the performance factor is equal to 1 | \({EAC}_{1}=AT+PD-ES\) | |
\({EAC}_{2}\) | Estimate at completion when the performance factor is equal to SPI | \({EAC}_{2}=AT+\frac{PD-ES}{SPT(t)}\) | |
\({EAC}_{3}\) | Estimate at completion when the performance factor is equal to SCI | \({EAC}_{2}=AT+\frac{PD-ES}{SCI(t)}\) | |
Earned duration method | Earned duration (ED) | Amount of time accrued or earned in accordance with the project’s progress at a specific point in time | \(ED=SPI x AD\) |
\({EAC}_{1}\) | Estimate at completion when the performance factor is equal to 1 | \({EAC}_{1}=AC+PD-ED\) | |
\({EAC}_{2}\) | Estimate at completion when the performance factor is equal to SPI | \({EAC}_{2}=AC+\frac{\text{PD}-\text{ED}}{ SPI}\) | |
\({EAC}_{3}\) | Estimate at completion when the performance factor is equal to SCI | \({EAC}_{3}=AC+\frac{\text{PD}-\text{ED}}{ SCI}\) | |
Planned value method | Planned rate per time (\({PV}_{rate}\)) | Predetermined pace required to complete the project within the scheduled time frame | \({PV}_{r}= \frac{BAC}{PD}\) |
\({EAC}_{1}\) | The Time Estimate at Completion is a projected duration for the project under the assumption that the performance factor is 1, indicating that the remaining work will be completed as initially planned | \({EAC}_{1}\)= PD – TV | |
\({EAC}_{2}\) | The Time Estimate at Completion is a projected duration for the project under the assumption that the performance factor is SPI | \({EAC}_{2}=\frac{PD}{SPI}\) | |
\({EAC}_{3}\) | Estimate at completion when the performance factor is equal to SCI | \({EAC}_{3}=\frac{PD}{SCI}\) |
