Edward de Bono developed the Six Thinking Hats method for structured thinking and discussion. The method involves assigning a colored hat to represent six different perspectives - white for facts, red for emotions, black for caution, yellow for optimism, green for creativity, and blue for process. An example illustrated how a group discussing whether to invest in a new building would approach the decision from each hat's perspective, with white analyzing data, black highlighting risks, red expressing concerns about the design, yellow focusing on potential profits, green proposing redesign ideas, and blue managing the discussion. The Six Hats method aims to make discussions and decision making more effective by considering issues from different angles.