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Agile Test Quadrants – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A model by Brian Marick that classifies tests along two axes: technology-facing vs business-facing, and supporting the team vs critiquing the product.
In simple words
A 2x2 grid mapping tests: unit/component (Q1), functional (Q2), exploratory/UAT (Q3), non-functional (Q4).
Exam tip
The quadrants help teams see which types of tests are missing from their strategy.
Related terms
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