Kanban is a graphical representation of work left to do versus time.

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Traceability of software requirements is important for understanding which requirements motivated the development of a specific component.

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An <> relationship between use cases indicates that every time that a use case is executed, the other use case will also be executed.

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Scalability is an example of a non-functional requirement.

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Reliability is a key non-functional requirement for mission-critical systems.

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Functional requirements answer the following : what is the system supposed to do?

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Interviews, focal groups, naires, forms, existing material, and observations can be sources for software requirements.