SSD.SG 3 Verify and Validate Service Systems

Some service providers refer to all verification and validation as “testing.” However, in CMMI, “testing” is considered a specific method used for verification or validation. Verification and validation are described separately in this process area to ensure that both aspects are treated adequately.

 

 

Verification practices include verification preparation, conduct of verification, and identification of corrective action. Verification includes testing of the service system and selected service system components against all selected requirements, including existing service agreements, service requirements, and service system requirements.

 

Validation demonstrates that the service system, as developed, will deliver services as intended. Verification addresses whether the service system properly reflects the specified requirements. In other words, verification ensures that “you built it right.” Validation ensures that “you built the right thing.”

Validation activities use approaches similar to verification (e.g., test, analysis, inspection, demonstration, simulation). These activities focus on ensuring the service system enables the delivery of services as intended in the expected delivery environment. End users and other relevant stakeholders are usually involved in validation activities. Both validation and verification activities often run concurrently and can use portions of the same environment. Validation and verification activities can take place repeatedly in multiple phases of the service system development process.