What it does vs how it behaves
Functional quality answers 'does the system do what it should?'. Non-functional quality answers 'how does it behave while doing it?' (speed, security, usability). Functional manual QA focuses mainly on the former, but must recognize the latter.
| Type | Question | Test example |
|---|---|---|
| Functional | Does it do the right thing? | Clicking 'Pay' creates the order |
| Non-functional | How does it do it? | The payment responds in under 2s |
QuestionToca para voltear
'Login responds in under 1 second' — functional or non-functional?
'The system must allow password reset by email' is a requirement that is…