Editor | On 23, Jan 2018

Konstantin Chugunov

This article is Translated from Russian to English and both versions are published here.

1. Check whether there is no problem in most restrictions make it impossible to use one of the TA.

Note 1: Constraints can be either explicitly described in the task, and flow out of context.

Note 2: The restrictions can be not only natural but also for example, economic, political, psychological and moral etc.

Note 3: Each found in the problem of the restriction must be checked for validity. True restrictions put super-system (something in the subsystems deteriorates), false limitations put people (mostly designers, trying to solve the problem).

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