Agile Software Development

Some teams using Scrum and XP tend to have special Q&A iterations every several iterations and/or before the release. While it might be ok, during the transition to the agile processes, as a rule of thumb having Q&A sprints is a good indication of the problems with the definition of "done". The main point of iterative development is to have a "potentially shippable" product at the end of iteration. Planning for Q&A sprints essentially means that at the end of the iteration, team does not plan to have a potentially shippable product.