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The 40 Principles by Richard Kaplan Richard Kaplan

Many TRIZ books and articles have listed the 40 Principles for inventive problems, but those that I have read only describe what the Principles are and provide examples of their applications. None analyzes what there is about these Principles that make them so useful for solving difficult problems, only that they have been chosen because of the frequency of their appearance in the patent literature. This article analyzes the Principles from several viewpoints in an attempt to understand why they are so useful.