Verification. (1) The process of determining whether the quality or performance of a product or service is as stated, as intended or as required. Verification is closely related to quality assurance and quality control. Computer System Verification: The process of ensuring that a phase in the system life cycle meets the requirements imposed on it by the previous phase. Model Verification: The process of determining whether a computational model correctly implements the intended conceptual model or mathematical model. System code verification: Review of source coding in relation to its description in the system code documentation. (2) Confirmation by means of objective evidence that specified requirements have been fulfilled. See: Validation. The corresponding status is termed verified. Verification may comprise activities such as: performing alternative calculations; comparing a new design specification with a similar proven design specification; undertaking tests and demonstrations; and reviewing documents prior to issue