In which cases are verification and validation used in QA, QSI, and Testing?

Verification and validation are used throughout the entire software development lifecycle.

Verification answers the question: "Are we building the product right?" It is a static check aimed at confirming that the product meets its specifications and requirements.

• In QA: Checking processes and documentation for compliance with standards and procedures.
• In Testing: Static tests, requirements analysis, code reviews, walkthroughs. Checking whether the code is written correctly and meets the design and requirements.
• In QSI (Quality System Interventions / Quality Systems Improvements): Auditing processes, checking the compliance of the quality system with established standards (ISO, CMMI).

Validation answers the question: "Are we building the right product?" It is a dynamic check aimed at confirming that the product meets user needs and intended use.

• In QA: Checking end-user satisfaction, testing for compliance with business goals.
• In Testing: Dynamic tests (functional, integration, system, acceptance testing). Checking that the product works as expected by the user and solves their tasks.
• In QSI: Assessing the effectiveness of implemented quality system improvements in terms of stakeholder satisfaction and achievement of business goals.