three-point estimation
📙 CTAL-TM
Official ISTQB Definition
A test estimation technique using three estimates: optimistic, most likely, and pessimistic. These are combined to produce a final estimate, often using weighted average formula.
3 Ways to Think About It
The Quick Take
Estimating with optimistic, most likely, and pessimistic values to account for uncertainty.
Look Closer
Using best case, typical, and worst case to calculate a realistic estimate.
The Bottom Line
A technique that acknowledges estimation uncertainty with a range.
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