11 Beforehand cushioning

Prepare emergency means beforehand to compensate for the relatively low reliability of an object.
  • Magnetic strip on photographic film that directs the developer to compensate for poor exposure
  • Back-up parachute
  • Alternate air system for aircraft instruments
TRIZ principe 11


Is this principle frequently used?

This principle is rarely used with 49 instances in the matrix.

This principle is proposed to solve the following contradictions:

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1/27 1/34 2/34 5/13 7/27 9/27 10/11 10/34 11/33 13/5 14/27 14/32 14/34 15/27 18/28 19/27 22/27 27/4 27/9 27/12 27/14 27/18 27/19 27/21 27/22 27/28 27/29 27/34 27/38 28/27 28/34 29/27 30/35 32/13 32/34 32/37 34/1 34/2 34/7 34/10 34/14 34/15 34/27 34/32 34/36 35/30 37/13 37/32 38/27


The colour indicates the ranking of the proposed principle to solve the contradiction: 1st, 2nd, 3rd, 4th.
This ranking reflects the frequency of occurrence of the principle in the analysed patents for this type of contradiction.
When a principle appears in first position, it means that it is statistically the most used in the patents studied for this type of problem.