The Six Thinking Hats is a brainstorming technique developed by Edward de Bono that promotes parallel thinking, where participants focus on one perspective at a time using colored hats to represent different styles of thinking. This method enhances clarity and structure during discussions, allowing individuals to explore various viewpoints like optimism, pessimism, and creativity without the confusion of free thinking. The document illustrates its application in decision-making around inventory management, highlighting participant insights using each thinking hat.