According to the PMBOK, 5th edition, p. 566, the glossary defines
- The assurance that a product, service, or system meets the needs of the customer and other identified stakeholders. It often involves acceptance and suitability with external customers. Contrast with verification."
- The evaluation of whether or not a product, service, or system complies with a regulation, requirement, specification, or imposed condition. It is often an internal process. Contrast with validation."
The distinction between these terms in PMI usage has confused many.
- verified deliverables -> validate scope process -> if approved, accepted deliverables
- change requests -> control quality process -> if approved, validated changes
- Validation Versus Verification on the PM Study Circle by Fahad Usmani
- Difference between Verification and Validation on iZenBridge by Jyoti Gupta on May 4, 2015.
- Validation vs. Verification Farndale's PMP Intelligence
- The difference between Verification and Validation on Serendipity, 29. November 2010, Steve Easterbrook's blog