Chapter 012
Write good requirements
Create clear, atomic and verifiable requirements.
Structure
Use a short title, one unambiguous obligation, necessary conditions and measurable acceptance criteria. Select the correct system, component, architecture or design type so traceability rules remain meaningful.
Example
| Weak | Better |
|---|---|
| The pump should be fast and safe. | The pump shall detect an occlusion within 2 seconds and generate an audible and visible alarm. |
| Operation must be easy. | A trained user shall change the flow rate with no more than five inputs. |
Lifecycle
Draft, review and implement before selecting a final status. A changed previously accepted requirement requires a new review cycle.