Planning poker is a popular tool to aid in the estimation process in Scrum and XP teams. James Grenning is the guy who invented the concept and it was popularized by Mike Cohn. There is a great [short] clip of James Grenning talking about how Planning Poker came about on YouTube. Here it is for your viewing pleasure...



If you would like more information on Planning Poker check out the Planning Poker page where you will find details on how to play the game, links to Mountain Goat Software (Mike Cohn) and a source to buy the cards.