The affinity diagram is a business tool used to organize ideas and data. It is one of the Seven Management and Planning Tools.
The tool is commonly used within project management and allows large numbers of ideas stemming from brainstorming[1] to be sorted into groups for review and analysis.[2]
The affinity diagram was devised by Jiro Kawakita in the 1960s[3] and is sometimes referred to as the KJ Method.
Once the cards have been sorted into groups the team may sort large clusters into subgroups for easier management and analysis.[4] Once completed, the affinity diagram may be used to create a cause and effect diagram.[5]