PERT Estimator
Three-point estimation using optimistic, most likely, and pessimistic durations.
Inputs
Results
Expected Duration (days)
8.67
TE = (O + 4M + P) / 6
Standard Deviation
1.67
σ = (P − O) / 6
Variance
2.78
σ²
Confidence Ranges
68% (±1σ)7.00 – 10.33 days
95% (±2σ)5.33 – 12.00 days
99.7% (±3σ)3.67 – 13.67 days