SFQ is pertaining to conformance to the functional requirements.

- The SFQ is measured by the level of end user satisfaction.

- The usability and the intuitiveness and responsiveness of the use cases are referred, so as to determine the simplicity / complexity of the operations.

- SFQ compliances with the original design, and desired testability.

- Example: Voice of the Customer can be compared with the level of intuitiveness and responsiveness to measure the quality.