The origins of SuField analysis are as follows. While systematically reading "The Bulletin of Invention" (in the late 1960s and the beginning of the 1970s), Altshuller noticed that many inventions of the day were based on adding a ferromagnetic material controlled by magnetic field (instead of some mechanical scheme previously employed). This was the beginning of SuField analysis: add ferromegnetic substance (or powder) and magnetic field. After that he started to generalize: what if other fields and other types of substance were added ?
Unfortunately, Altshuller discovered the SuField trends at the time when their killer was born. In the beginning of the 1970s microprocessors came into existence. Since then, the most progressive trend in the evolution of technical systems became this: add microprocessor + communication link + something else required for them to work. This trend was missed by Altshuller and his not very clever disciples on the whole. There is no indication that they suspect about its existence even today when microchips are added to everything. Instead they continue to add substance and field ...
For example, the problem of detecting items being stolen from stores, has been discussed numerous times at various TRIZ seminars. Solutions proposed were always like this: add magnetic labels and field (detector) that detects them. Some other types of labels and detectors were also discussed. But never ever anybody would propose to add a microchip that would send signals (to the store's computer) about the location of the item. Meanwhile, it is a much more reliable anti-theft solution than adding labels and detectors.
In short, adding Microchip and Communication Link is much more progressive trend in the technology than adding Substance and Field. SuField analysis ought to have been replaced by MiComm analysis long time ago.
There are two different trends in replacing "stupid" SuField schemes (including the purely mechanical ones) by "smart" microchip schemes:
(The further details of MiComm Analysis are described in the proprietary documents of "Thought Guiding Systems" Corporation and cannot be disclosed at present.)