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

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How Do You Get Estimates?[1]

[1] In this book, there's more about estimation in Iteration planning, Experience Improves Estimates, and How to Estimate Anything.

Estimating is scary. Assume for now that no one will know but you what you come up with. We'll talk about how to deal with errors shortly.

With all the programmers together, estimates will tend to average out. And remember: we have our velocity adjustment to give us some slack, and we will be revising the schedule many times as we go along

Programmers divide up into teams of two or three. Each team looks at each story. Reflect on how you are going to do it in the system, using your experience in general, and any exploration already done, to guide you. Talk through an option, and estimate ...

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