History
Studying paths of evolution of technical systems has been a primary research method of TRIZ since its inception. But until the 1970s the discovered recurrent patterns of evolution were not consolidated into a separate section of TRIZ and were scattered among other sections. In the 1970s Altshuller consolidated them into a new section of TRIZ that he called "the laws of technical systems evolution". It included both previously discovered recurrent patterns of evolution and newly discovered ones. Studying "laws of evolution" became an independent research topic in TRIZ. The following authors, besides Altshuller, contributed most to it: Yuri Khotimlyansky (studied patterns of energy conductivity in technical systems), Vladimir Asinovsky (proposed principles of correspondence of various components of technical systems), Yevgeny Karasik (co-authored with Altshuller the law of transition from a macro-level to a micro-level, introduced the notion of dual technical systems and studied the patterns of their evolution).
Read more about this topic: Laws Of Technical Systems Evolution
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