XP Foci

• Make the software release cycle extremely short
• Continuously involve the customer

XP Values

• Communication
  • Need constant interactions of customer, developers
  • Pairs help
  • Most problems caused by miscommunication (or lack of communication)
• Simplicity
  • "What is the simplest thing that could possibly work?"
  • Do not anticipate future requirements (they may not happen)
  • Simplify (refactor) whenever possible
• Feedback
  • Testing drives development (so you know when something must change and when it is fixed)
  • Customers write "stories", based on current system
  • Consider every release a prototype for the next
• Courage
  • Move ahead quickly
  • Throw away code that seems hopeless
  • Pause as needed to refactor

created April 29, 2003 last revised April 30, 2003

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