TRIZ – 40 Principles
1 Segmentation 21 Skipping
2 Taking out 22 Blessing in disguise
3 Local quality 23 Feedback
4 Asymmetry 24 Intermediary
5 Merging 25 Self-service
6 Universality 26 Copying
7 Russian dolls 27 Cheap short-lived objects
8 Anti-weight 28 Mechanics substitution
9 Preliminary anti-action 29 Pneumatics and hydraulics
10 Preliminary action 30 Flexible shells and thin films
11 Beforehand cushioning 31 Porous materials
12 Equipotentiality 32 Colour changes
13 "The other way round" 33 Homogeneity
14 Spheroidality - Curvature 34 Discarding and recovering
15 Dynamics 35 Parameter changes
16 Partial or excessive actions 36 Phase transitions
17 Another dimension 37 Thermal expansion
18 Mechanical vibration 38 Strong oxidants
19 Periodic action 39 Inert atmosphere
20 Continuity of useful action 40 Composite materials
2Module SESA3002a; Aerospace Design
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