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If you have ever had any experience with Agile or Scrum estimation and planning, you should have surely heard or read about planning poker. In a nutshell, planning poker is an estimation technique used by agile project teams to collectively estimate the relative size of their stories using a measurement called story point.
To be effective with planning poker, the project team is supposed to be composed of generalists who have experience with the different software development tasks such as requirements, analysis, design, coding, and testing.