Guides
3 guides on requirements. Practical writing from the team building Atlas, useful whether or not you buy anything.
A use case diagram answers a simple question - who can do what with this system. PlantUML makes one from a few lines of actors, use cases, and the relationships between them.
Mermaid's requirement diagram brings SysML-style requirements modeling to text - declare requirements, link them to the elements that satisfy them, and trace verification.
A use case diagram maps who uses a system and what they use it to do. This guide covers actors, use cases, boundaries, and the include and extend relationships that trip people up.
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