VModelle

VModelle is a term used mainly in German-speaking contexts to denote modeling approaches that adopt the V-model concept from systems engineering and software development. The term does not refer to a single formal framework; instead, it describes families of models and templates that organize activities along a V-shaped lifecycle, emphasizing verification and validation at corresponding stages on the left and right sides of the V.

Within this tradition, the V-Modell XT is a prominent standardized life-cycle model used in public-sector IT projects in Germany. Earlier variants such as V-Modell 97 and related documents contributed to the evolution of this approach. The V-Modell family outlines processes for requirements engineering, architecture design, implementation, integration, testing, and maintenance.

Practitioners employing VModelle typically create documentation artifacts and modeling templates aligned with the V lifecycle. Typical elements include requirements specifications, architectural descriptions, module interfaces, test plans, and verification reports; the emphasis is on traceability between development activities and corresponding validation activities.

There is no single, universally accepted definition of VModelle as a standalone standard. In many cases, the term is used informally to refer to V-model-inspired modeling practices or to the V-Modell XT framework when discussing German IT project methodologies.