In software project management, software testing, and software engineering, verification and validation (V&V) is the process of checking that a software system meets specifications and requirements so that it fulfills its intended purpose. It may also be referred to as software quality control. It is normally the responsibility of software testers as part of the software development lifecycle. In simple terms, software verification is: "Assuming we should build X, does our software achieve its goals without any bugs or gaps?" On the other hand, software validation is: "Was X what we should have built? Does X meet the high-level requirements?" Verification and validation are not the same thing, although they are often confused. Boehm succinctly expressed the difference as Verification: Are we building the product right? Validation: Are we building the right product? "Building the product right" checks that the specifications are correctly implemented by the system while "building the right product" refers back to the user's needs. In some contexts, it is required to have written requirements for both as well as formal procedures or protocols for determining compliance. Ideally, formal methods provide a mathematical guarantee that software meets its specifications. Building the product right implies the use of the Requirements Specification as input for the next phase of the development process, the design process, the output of which is the Design Specification. Then, it also implies the use of the Design Specification to feed the construction process. Every time the output of a process correctly implements its input specification, the software product is one step closer to final verification. If the output of a process is incorrect, the developers are not building the product the stakeholders want correctly. This kind of verification is called "artifact or specification verification". Building the right product implies creating a Requirements Specification that contains the needs and goals of the stakeholders of the software product.

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Concepts associés (4)
Qualité logicielle
En informatique et en particulier en génie logiciel, la qualité logicielle est une appréciation globale d'un logiciel, basée sur de nombreux indicateurs. La complétude des fonctionnalités, la correction et précision des résultats, la fiabilité, la tolérance de pannes, la facilité et la flexibilité de son utilisation, la simplicité, l'extensibilité, la compatibilité et la portabilité, la facilité de correction et de transformation, la performance, la cohérence et l'intégrité des informations qu'il contient sont tous des facteurs de qualité.
Assurance qualité logicielle
L’assurance qualité logicielle (AQL) est un ensemble d'activités planifiées et systématiques de toutes les actions nécessaires pour fournir une assurance suffisante de la qualité logicielle d'un nouveau logiciel ou d'une nouvelle version d'un logiciel est conforme aux exigences et aux attentes établies. Les pratiques d'AQL varient selon le modèle d'affaire et l'industrie où le logiciel est utilisé. La norme IEEE 730 décrit le contenu nécessaire dans un plan d'AQL pour un logiciel.
Software development process
In software engineering, a software development process is a process of planning and managing software development. It typically involves dividing software development work into smaller, parallel, or sequential steps or sub-processes to improve design and/or product management. It is also known as a software development life cycle (SDLC). The methodology may include the pre-definition of specific deliverables and artifacts that are created and completed by a project team to develop or maintain an application.
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