Advanced PERT Calculator
Professional Project Estimation & Risk Analysis Tool
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Task List
| Task | Optimistic (O) | Most Likely (M) | Pessimistic (P) | Expected Time (TE) | Std Dev (σ) | Variance (σ²) | Action |
|---|---|---|---|---|---|---|---|
| No tasks added yet. Start by adding tasks above. | |||||||
Project Summary
Add tasks to see project estimates and analysis.
Probability Analysis
Calculate the probability of completing the project within a specific time:
PERT Analysis Interpretation
PERT (Program Evaluation and Review Technique) is a statistical tool used in project management to analyze and represent the tasks involved in completing a project.
- Expected Time (TE) = (O + 4M + P) / 6 — weighted average of time estimates
- Standard Deviation (σ) = (P - O) / 6 — measures variation or uncertainty
- Variance (σ²) = σ² — useful for calculating total project variance
These results assume tasks are independent and durations sum linearly. The probability calculation is based on the Central Limit Theorem assuming a normal distribution.