PMP® Toolkit
PERT Calculator
Three-Point Estimating for accurate project schedules.
1. Estimate Durations
PERT (Beta) Estimate
Weighted average used in PMP exams.
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days/hours
$$ \frac{O + 4M + P}{6} $$
Triangular Average
Simple average (less accurate).
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days/hours
$$ \frac{O + M + P}{3} $$
Standard Deviation (SD)
Risk Uncertainty (+/-)
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