IEACs vs. Ctr EAC Chart
The IEACs vs. Ctr EAC chart on the EAC Realism tab compares the contractor's estimate at completion to a set of independent statistical EACs. You can use this chart to assess your EAC realism by seeing if it falls in the range defined by the independent EACs and, if so, where it falls in that range.
Chart Format
The IEACs vs. Ctr EAC chart is a combination bar chart and line chart, with a separate bar for each independent EAC for each period and a superimposed line chart representing the contractor's EAC for each period.
| Chart Item | Description |
|---|---|
| Horizontal axis | The horizontal axis displays the range of periods. |
| Vertical axis | The vertical axis displays the range of EAC amounts. |
| Bars | Each bar represents the EAC amount for that independent EAC and period. |
| Lines | Each line represents the change in the contractor's EAC amount over the range of periods.
Each data point on the line represents the contractor EAC amount for that period. |
Chart Data
You can display the values for each period based either on cumulative or current data.
| Data Item | Description |
|---|---|
| CPI EAC amount | EAC calculated based on cumulative CPI: ACWPcum + [(BAC – BCWPcum) / CPIcum] |
| Weighted Cost and Schedule amount | EAC calculated using the weighted cost and schedule formula: ACWPcum + [(BAC – BCWPcum) / ((Cost weight factor * CPI) + (Schedule weight factor * SPI))]
The cost weight factor is defined in wInsight Analytics Administrator, and the schedule weight factor is calculated as 1 – Cost weight factor. For example, a commonly used set of weight factors are 0.8 for cost and 0.2 for schedule. |
| CPI * SPI | EAC calculated based on a composite of CPI and SPI: ACWPcum + [(BAC – BCWPcum) / (CPIcum * SPIcum)] |
| Contractor's EAC | Contractor's estimate at completion: Latest revised estimate (LRE) |