Agile Extreme offers Planning Poker® cards for your use in estimating. Each deck contains enough cards for four estimators to each hold cards with the following values: ?, 0, ½, 1, 2, 3, 5, 8, 13, 20, 40, 100, and ∞. The cards are printed on top quality and environmental friendly card paper. Each deck comes in a box to protect the cards and make them last longer.
Planning poker, also called Scrum poker, is a consensus-based, gamified technique for estimating, mostly used to estimate effort or relative size of development goals in software development. In planning poker, members of the group make estimates by playing numbered cards face-down to the table, instead of speaking them aloud. The cards are revealed, and the estimates are then discussed. By hiding the figures in this way, the group can avoid the cognitive bias of anchoring, where the first number spoken aloud sets a precedent for subsequent estimates.
Planning poker is a variation of the Wideband Delphi method. It is most commonly used in agile software development, in particular in Scrum and Extreme Programming.
The method was first defined and named by James Grenning in 2002 and later popularized by Mike Cohn in the book Agile Estimating and Planning, whose company trade marked the term and a digital online tool.