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1. Affinity Diagram
Also called: affinity chart, K-J method
Variation: thematic analysis
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Description
The affinity diagram organizes a large number of ideas into their natural relationships. This method taps a team’s creativity and intuition. It was created in the 1960s by Japanese anthropologist Jiro Kawakita.-------------------------------------------------
When to Use an Affinity Diagram
* When you are confronted with many facts or ideas in apparent chaos
* When issues seem too large and complex to grasp
* When group consensus is necessary
Typical situations are:
* After a brainstorming exercise
* When analyzing verbal data, such as survey results.
-------------------------------------------------Affinity Diagram Procedure
Materials needed: sticky notes or cards, marking pens, large work surface (wall, table, or floor).
1. Record each idea with a marking pen on a separate sticky note or card. (During a brainstorming session, write directly onto sticky notes or cards if you suspect you will be following the brainstorm with an affinity diagram.) Randomly spread notes on a large work surfaceso all notes are visible to everyone. The entire team gathers around the notes and participates in the next steps.
2. It is very important that no one talk during this step. Look for ideas that seem to be related in some way. Place them side by side. Repeat until all notes are grouped. It’s okay to have “loners” that don’t seem to fit a group. It’s all right to move a note someone else hasalready moved. If a note seems to belong in two groups, make a second note.
3. You can talk now. Participants can discuss the shape of the chart, any surprising patterns, and especially reasons for moving controversial notes. A few more changes may be made. When ideas are grouped, select a heading for each group. Look for a note in each grouping that captures the meaning of the group. Place it atthe top of the group. If there is no such note, write one. Often it is useful to write or highlight this note in a different color.
4. Combine groups into “supergroups” if appropriate.
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Affinity Diagram Example
The ZZ-400 manufacturing team used an affinity diagram to organize its list of potential performance indicators. Figure 1 shows thelist team members brainstormed. Because the team works a shift schedule and members could not meet to do the affinity diagram together, they modified the procedure.

Figure 1 Brainstorming for Affinity Diagram Example
They wrote each idea on a sticky note and put all the notes randomly on a rarely used door. Over several days, everyone reviewed the notes in their spare time and moved the notesinto related groups. Some people reviewed the evolving pattern several times. After a few days, the natural grouping shown in figure 2 had emerged.
Notice that one of the notes, “Safety,” has become part of the heading for its group. The rest of the headings were added after the grouping emerged. Five broad areas of performance were identified: product quality, equipment maintenance, manufacturingcost, production volume, and safety and environmental.

Figure 2 Affinity Diagram Example
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Affinity Diagram Considerations
* The affinity diagram process lets a group move beyond its habitual thinking and preconceived categories. This technique accesses the great knowledge and understanding residing untapped in our intuition.
* Veryimportant “Do nots”: Do not place the notes in any order. Do not determine categories or headings in advance. Do not talk during step 2. (This is hard for some people!)
* Allow plenty of time for step 2. You can, for example, post the randomly-arranged notes in a public place and allow grouping to happen over several days.
* Most groups that use this technique are amazed at how powerful and...
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