Chapter 5 Evolutionary requirements

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Presentation transcript:

Chapter 5 Evolutionary requirements Expect change! Learn as you go Validate as you build Why – 25% requirements change on an average software project

The case against waterfall On average 25% of requirements change during a project Inflexible Fig 5.1 in text - 45 % of requirements actually not used! A word of caution - waterfall is sometime still the best way! (why?)

Finding The text emphasizes finding requirements This requires skill!

FRUPS + Functional Usability Reliability Performance Supportability

+ Implementation Interface Operations Packaging Legal

UP defines: Use-Case Model Supplementary specs – non-functional Glossary Vision Business rules

Resources Text offers several suggestions Also, refer to any text on UP or software engineering as well

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