Before revision: Basic principles Prism of TRIZ Contradictions Matrix 40 principles of TRIZ method rendered schematicallyOne of the tools which evolved as an extension of the 40 principles was a contradiction matrix.
After revision: Principles alt=See caption|TRIZ flowchartContradictions matrix|alt=A chart with many squares 40 principles of TRIZ |alt=40 small illustrations of TRIZ which evolved as an extension of TRIZOne tool was a contradiction matrix.