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Affinity Diagrams

Affinity diagrams are a technique for organizing a large number of ideas into natural groupings or categories to identify themes and patterns.

Explanation

Affinity diagrams are used to organize and consolidate information generated from techniques like brainstorming. Participants write individual ideas on sticky notes or cards, then the group collaboratively sorts them into natural categories based on their relationships and similarities. The technique is sometimes called the KJ method, named after its creator Jiro Kawakita.

This technique is especially valuable when a brainstorming or data gathering session produces an overwhelming number of ideas. By clustering related items together, the team can identify common themes, gaps, and patterns that might not be apparent when viewing ideas individually. Affinity diagrams help bring structure to unstructured data.

Affinity diagrams are widely used in requirements gathering, risk identification, quality management, and retrospectives. They work well as a follow-up to brainstorming and are often used in combination with other organizing techniques such as mind mapping or hierarchical charts.

Key Points

  • Organizes large volumes of ideas into natural categories
  • Also known as the KJ method
  • Helps identify themes, patterns, and gaps in collected data
  • Commonly used after brainstorming to bring structure to unstructured ideas

Exam Tip

When a question describes grouping or categorizing a large number of ideas from a brainstorming session, the answer is affinity diagrams.

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