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The V-Model is a phase-oriented development model for planning, implementing and accepting technical systems. It emphasizes defined roles, comprehensive documentation and integrated verification/validation along a V-shaped lifecycle. Implementation requires coordinated processes, clear decision gates and governance for complex software and systems projects.
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The V-model is a process model that pairs development phases with corresponding verification and integration phases.
The V-model grew from technical systems engineering and quality assurance to couple development and testing traceably. It evolved into public-sector and industrial variants, including the German V-Modell and V-Modell XT.
The left side covers specification and decomposition; the right covers integration and validation. Each early decision receives a corresponding later test. Iteration and feedback complement the structure.
Development and testing are connected through corresponding phases.
Specifications are refined and tested at each level.
Documentation and fitting reviews structure complex work.
The V-model creates clear checkpoints where systems require strong quality evidence.
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