2 Taking out

Separate an interfering part or property from an object, or single out the only necessary part (or property) of an object.
  • Locate a noisy compressor outside the building where compressed air is used.
  • Use fiber optics or a light pipe to separate the hot light source from the location where light is needed.
  • Use the sound of a barking dog, without the dog, as a burglar alarm.
TRIZ principe 2


Is this principle frequently used?

This principle is often used with 222 instances in the matrix.

This principle is proposed to solve the following contradictions:

Click on a contradiction to explore it

1/7 1/9 1/22 1/33 1/34 2/6 2/8 2/14 2/16 2/30 2/34 2/38 3/22 3/25 4/8 4/29 4/33 5/1 5/10 5/13 5/17 5/23 5/29 5/31 5/37 5/39 6/2 6/13 6/16 6/26 6/29 6/30 6/37 7/1 7/18 7/24 7/25 7/29 7/31 7/39 8/4 8/10 8/12 8/27 8/37 8/39 9/1 9/17 9/21 9/31 9/34 10/8 10/15 10/38 11/13 11/17 11/22 11/30 11/31 11/34 11/37 12/8 12/19 12/21 12/30 12/34 13/1 13/5 13/11 13/22 13/23 13/34 13/35 13/36 14/31 14/33 14/36 15/3 15/7 15/10 15/18 15/27 16/35 17/9 17/11 17/21 17/30 17/31 17/35 17/36 17/38 18/2 18/7 18/15 18/38 18/39 19/10 19/12 19/18 19/31 19/36 19/38 20/18 20/30 21/9 21/10 21/12 21/17 21/28 21/29 21/30 21/31 21/34 21/38 22/3 22/13 22/23 22/30 22/31 22/34 22/38 23/5 23/13 23/22 23/33 23/34 23/35 24/8 25/3 25/7 26/6 26/13 26/28 26/34 27/8 27/15 27/30 27/31 28/10 28/26 28/35 28/38 29/4 29/6 29/7 29/19 29/21 29/22 29/36 30/2 30/6 30/11 30/17 30/20 30/21 30/22 30/24 30/27 30/32 30/33 30/34 31/5 31/7 31/11 31/14 31/17 31/19 31/21 31/22 31/27 31/37 31/38 32/30 32/33 32/35 33/1 33/11 33/21 33/22 33/23 33/28 33/30 33/32 34/1 34/2 34/7 34/12 34/13 34/14 34/21 34/23 34/26 34/28 34/30 35/3 35/16 35/17 35/23 36/2 36/13 36/14 36/17 36/19 36/22 36/28 37/5 37/6 37/8 37/18 37/31 37/33 38/10 38/17 38/19 38/21 38/30 38/31 39/7 39/8 39/15 39/32 39/37


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.