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TRIZ 40 Principles

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2. Extraction

Extraction means to take out or separate something, such as removing a painful tooth or singling out the critical parts of a system. Sometimes simply placing a bad part of the system in a different place lessens the bad effect or removes it completely, as with our lamp post example. Seek the value of different parts or aspects. Low-value items may be eliminated or high-value items may be extracted and used elsewhere in different circumstances.