Chapter 2 – Testing Throughout the SDLC
V-Model – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A sequential development model that pairs each development phase with a corresponding test level.
In simple words
Each dev phase (requirements, design, code) has a matching test level (acceptance, system, component) drawn as a V.
Exam tip
V-model is the classic teaching model for the four test levels; expect a diagram question.
Related terms
- Waterfall ModelRequirements → design → build → test → release, in a straight line with limited backtracking.
- Component TestingTesting the smallest testable pieces of code (a function, class, or module) in isolation, usually by developers.
- Acceptance TestingThe ‘go / no-go’ testing that confirms the system meets business needs and is ready to be released to real users.
Practice this term in the ISTQB Mock Test
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