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Estimate at Completion (EAC).

Source: R/evm.R
eac.Rd

Calculates the Estimate at Completion (EAC) using various methods based on project performance assumptions.

Usage

eac(bac, method = "typical", cpi = NULL, ac = NULL, ev = NULL, spi = NULL)

Arguments

bac

Budget at Completion (BAC) (total planned budget).

method

The EAC calculation method. One of:

  • "typical" (default): EAC = BAC / CPI. Assumes future work performed at current cost efficiency.

  • "atypical": EAC = AC + (BAC - EV). Assumes future work performed at planned rate.

  • "combined": EAC = AC + (BAC - EV) / (CPI * SPI). Considers both cost and schedule performance.

cpi

Cost Performance Index (CPI). Required for "typical" and "combined" methods.

ac

Actual Cost. Required for "atypical" and "combined" methods.

ev

Earned Value. Required for "atypical" and "combined" methods.

spi

Schedule Performance Index. Required for "combined" method.

Value

The function returns the Estimate at Completion (EAC).

See also

pv, ev, ac, sv, cv, spi, cpi, etc, vac, tcpi

Examples

# Method 1: Typical - assumes current CPI continues
bac <- 100000
cpi <- 0.83
eac <- eac(bac, cpi = cpi)
cat("EAC (typical):", round(eac, 2), "\n")
#> EAC (typical): 120481.9 

# Method 2: Atypical - assumes future work at planned rate
ac <- 63000
ev <- 35000
eac <- eac(bac, method = "atypical", ac = ac, ev = ev)
cat("EAC (atypical):", round(eac, 2), "\n")
#> EAC (atypical): 128000 

# Method 3: Combined - considers both CPI and SPI
spi <- 0.875
eac <- eac(bac, method = "combined", cpi = cpi, ac = ac, ev = ev, spi = spi)
cat("EAC (combined):", round(eac, 2), "\n")
#> EAC (combined): 152500.9