17 October 2021

Agile frequent verification and validation

Agile frequent verification and validation

  • Any iteration in agile development must produce artefacts, typically code, that pass the phase of verification and validation.
    • Therefore, all iterations must have phases like this :
      • For requirements and design, the verification and validation is the result of peer reviews with team members and with the customer.
      • For coding, verification and validation is done by code reviews, unit testing and functional testing.

Verification

  • Basics of verification :
    • Am I building the right product ?
      • Determining if the system complies with the requirements and performs functions for which it is intended and meets the organization’s goals and user needs. It is traditional and is performed at the end of the project.
    • Am I accessing the right data ?
  • High level activity
    • Performed after a work product is produced against established criteria ensuring that the product integrates correctly into the environment
    • Determination of correctness of the final software product by a development project with respect to the user needs and requirements

Validation

  • Basics of validation :
    • Am I building the product right ?
      • The review of interim work steps and interim deliverables during a project to ensure they are acceptable.
      • To determine if the system is consistent, adheres to standards, uses reliable techniques and prudent practices, and performs the selected functions in the correct manner.
    • Am I accessing the data right ?
      • in the right place; in the right way
  • Low level activity
    • Performed during development on key artefacts, like walkthroughs, reviews and inspections, mentor feedback
      Demonstration of consistency, completeness, and correctness of the software at each stage and between each stage of the development life cycle.

Verification and Validation purpose

  • An Agile Methodology does NOT mean that there will be « frequent changes in requirements. »
  • What Agile specifically does is to begin with very high level view of the requirements at commencement, and through the iterative process to begin honing those requirements with your stakeholders as they begin to interact with the product itself.

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