eXtreme Programming Principles
Honest Measurement
Few
cards completed per iteration (velocity)
cards left to complete
Acceptance tests defined/passed
Simple
Powerful
Can always estimate time to finish
Can tell acceleration or deceleration
XP requires us to learn to trust ourselves. Trust that if we do a good job(tests, refactoring, communication) of solving today's problems, we'll be able to add complexity tomorrow where we need it.
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