This artifact offers a template and guidelines which can be used by agile teams to commit to stories for a sprint using the proven top-down "Poker Planning" technique (for both Developers and Testing) and the capacity in hand.

The poker player learns that sometimes both science and common sense are wrong; that the bumblebee can fly; that, perhaps, one should never trust an expert; that there are more things in heaven and earth than are dreamt of by those with an academic bent. (David Mamet)

http://geektester.blogspot.com/2011/12/agile-test-estimations-using...

Thanks,

Raj