Chapter 4 – Test Analysis & Design
Statistical Testing – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A test design technique in which a model of the statistical distribution of the input is used to construct representative test cases.
In simple words
Pick test inputs by sampling from a statistical model of real usage instead of choosing them by hand.
Exam tip
Statistical testing plus an operational profile is the classical way to estimate software reliability.
Related terms
- Operational ProfileA weighted map of how real users spend their time in the system — used to focus testing on high-usage flows.
- Random TestingGenerate inputs at random (often weighted by how users actually use the system) instead of hand-picking them.
- Reliability TestingCheck the system keeps working correctly over time under expected load.
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