Program validation ensures that software meets the needs and expectations of end-users or stakeholders by confirming it performs its intended functions accurately. Unlike verification, which checks adherence to specifications, validation focuses on real-world usability and functionality. It typically occurs after development through activities like testing, prototyping, and user feedback analysis to confirm the software aligns with client requirements and stakeholder expectations[1][2][5].

Citations:
[1] What is verification vs. validation? (Differences explained) - Indeed https://uk.indeed.com/career-advice/career-development/verification-vs-validation
[2] Verification vs Validation: The Differences, Tools & Benefits https://www.bairesdev.com/blog/difference-between-verification-and-validation-testing/
[3] Software Verification and Validation - SQS https://www.sqs.es/software-verification-and-validation/?lang=en
[4] Verification vs Validation - What’s the Difference? - Arbour Group https://www.arbourgroup.com/blog/2015/verification-vs-validation-whats-the-difference/
[5] Verification and Validation in Software Testing - BrowserStack https://www.browserstack.com/guide/verification-and-validation-in-testing
[6] Verification vs Validation in Software: Overview & Key Differences https://www.bplogix.com/blog/verification-vs-validation-in-software
[7] Verification and validation https://en.wikipedia.org/wiki/Software_verification_and_validation
[8] Computer Software Validation Definition - Arena Solutions https://www.arenasolutions.com/resources/glossary/software-validation/