(1) Confirmation, through the provision of objective evidence, that the requirements for a specific intended use or application have been fulfilled. (ISO/IEC 2008, Section 4.37)
(2) The process of providing evidence that the software and its associated products satisfy system requirements allocated to software at the end of each life cycle activity, solve the right problem, and satisfy intended use and user needs. (IEEE 1012-2004, 3.1.35)
(3) The set of activities ensuring and gaining confidence that a system is able to accomplish its intended use, goals and objectives; (ISO/IEEE 2008, 1, Section 4.54)
(4) The process of evaluating a system or component during or at the end of the development process to determine whether a system or component satisfies specified requirements; (IEEE 1998a, Section 3.2)
(6) Confirmation by examination and provision of objective evidence that the particular requirements for a specified intended use are fulfilled; (ISO 8402)
(7) The process of determining that the systems engineering process had produced the right system based upon the needs expressed by the stakeholder. (Buede 2009)
(1) ISO/IEC. 2008. Systems and Software Engineering - System Life Cycle Processes. Geneva, Switzerland: International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC). ISO/IEC 15288:2008 (E).
(2) IEEE. 2004. IEEE Standard for Software Verification and Validation. Institute of Electrical and Electronics Engineers (IEEE) Standards Association: 3.1.35. IEEE 1012-2004.
(3) ISO/IEC. 2008. Systems and Software Engineering — System Life Cycle Processes. Geneva, Switzerland: International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC), ISO/IEC 15288:2008 (E).
(4) IEEE. 1998. IEEE Guide for Developing System Requirements Specifications. Washington, DC: Institute of Electrical and Electronics Engineers(IEEE) Standards Association, IEEE 1233-1998.
(5) PMI. 2008. A Guide to the Project Management Body of Knowledge (PMBOK® Guide), 4th ed. Newtown Square, PA, USA: Project Management Institute (PMI).
(6) ISO 8402. 1994. Quality Management and Quality Assurance — Vocabulary Geneva, Switzerland: International Organization for Standardization (ISO). ISO 8402:1994
(7) Buede, D. M. 2009. The Engineering Design of Systems: Models and Methods. 2nd ed. Hoboken, NJ, USA: John Wiley & Sons Inc.
Verification is a process to answer the question Have we built the system right? (i.e., does it satisfy the system requirements?)
Validation answers the question Have we built the right system? (i.e., does it satisfy the customer and user needs?)
For a full discussion of the role and importance of validation in Systems Engineering see the System Validation article.
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