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Extreme Programming Installed by Chet Hendrickson, Ann Anderson, Ron Jeffries

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Early on, Start with Intuitive Time Estimates

You might want to express your estimates using a neutral term such as points, but the best way we know to start is with perfect engineering weeks. Here's how to do it.

Try to begin with a story that you can imagine how to do. If the story is so new to you that you can't imagine how to do it, then you need to do a Spike Solution Basically a spike is just an experiment, where you do enough work to get a good feeling for how to implement the story.

If you do know approximately how to implement the story, chat with your team members, and try to get into coffee-room mode. You know, that frame of mind where you say, "I could implement that in a week if they'd just leave me alone to do it." That's your intuition ...

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