The document discusses test-driven development (TDD) and how it can help address some common "code smells" or issues that arise during software development. It notes that TDD involves writing unit tests before writing the code itself to satisfy those tests, which helps ensure code is modular, highly tested, and focused on user needs. By writing tests first, TDD aims to reduce rework and catch defects earlier in the development process when they are cheaper to fix.

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Derick Bailey
http://www.infoq.com/jp/news/2008/03/tdd-smells

7. TDD

14. System Software
Heuristics

18. http://www.ogis-ri.co.jp/otc/swec/process/am-res/am/artifacts/essentialUseCase.html
http://www.ogis-ri.co.jp/otc/swec/process/am-res/am/artifacts/systemUseCase.html

25. TDD
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TDD
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27. Developer
Testing
Customer
Testing
QA
Testing

28. Developer Test
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Customer Test
Developer Test
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Customer Test