REQ-FUN-120
EAC forecasting by three methods (CPI, CPI*SPI, optimistic)
What
For each project, system SHALL compute Estimate At Completion using three established_guidelines_standard methods: EAC_cpi = BAC / CPI (typical performance continues), EAC_cpi_spi = AC + (BAC - EV) / (CPI * SPI) (both cost and schedule performance continue), and EAC_optimistic = AC + (BAC - EV) (remaining work as originally budgeted). All three are returned in the EVM response.
Why
established project management guidelines Control Costs documents these three forecasting methods; different stakeholders trust different assumptions. Showing all three avoids hiding uncertainty.
How
Extends the REQ-FUN-118 response with eac_cpi, eac_cpi_spi, eac_optimistic fields. Web UI defaults to showing eac_cpi but exposes the other two on hover/expand.
Done when
All three EAC values computed; reference-textbook example reproduces the documented values; UI defaults to eac_cpi with the others accessible.
Out of scope
Custom user-supplied EAC formulas.
established project management guidelines Mapping
EAC forecasting - established project management guidelines Control Costs forecast output.