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planning poker
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.
== Process ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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