How to handle estimates for programmers joining the team?

Posted by Jordan on Programmers See other posts from Programmers or by Jordan
Published on 2012-06-19T13:57:05Z Indexed on 2012/06/19 15:23 UTC
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estimation

Iteration has already started, new programmer joins the team, task X has already been estimated to be 30 hours by a different developer.

What is the best practice in this situation?

new developer runs with the given estimate (the idea being that any discrepancy will be corrected for when velocity is calculated?)
new developer re-estimates task? (if so, what if it's significantly higher and no longer fits in the iteration?)
throw our hands up and go back to waterfall?
something else entirely?

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