Although Psi has had a fair number of succesful Google Summer of Code projects so far, we have experienced some failures as well: the summer before last, 3 out of 6 projects didn't make the final deadline. A project's failure was typically due to not having anything really usable at the end of the summer, regardless of the good work that was done during the past months. To reduce the risk of such surprises, I decided to take an Agile Development approach for this year's ‘Roster improvement’ project.

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