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Writing System Requirements

Writing System Requirements. Parts of a Requirements Spec. Description of the system Not your system, yet… Indexed requirements Models of the system Use cases Sequence diagrams. How to write a requirement. Clear, concise statements Active voice Explain acronyms

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Writing System Requirements

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  1. Writing System Requirements

  2. Parts of a Requirements Spec. • Description of the system • Not your system, yet… • Indexed requirements • Models of the system • Use cases • Sequence diagrams

  3. How to write a requirement • Clear, concise statements • Active voice • Explain acronyms • Avoid or explain technical jargon

  4. Example: A Door • What requirements might this system have? • How do we phrase them clearly?

  5. Example: An elevator • Break into groups • Write a list of requirements • 5 min. • Use paper • Try to be: • Clear • Concise • Unambiguous

  6. Example: A Door? • What did we underspecify? • What did we overspecify?

  7. Example: An Elevator? • Break into groups • Rotate requirements • What is the worst design that still meets the specification? • 5 min. • Draw result on whiteboard

  8. Making Good Requirements • Your requirements  other people • Needs to be: • complete • understandable

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