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40 TRIZ Principles
| Question | Answer |
|---|---|
| different focal length lenses for a camera; individually wrapped slices of chees | segmentation |
| non-smoking areas in restaurants/railway cars; scarecrow; dog bark as alarm | taking out |
| drink cans shapes for stable stacking; soft hand grips | local quality |
| spout of a jug | asymmetry |
| bring closer together (merge) identical or similar objects or operations in space | merging |
| make an object perform multiple functions; elminate the need for other parts | universality |
| place one object inside another | nested doll |
| to compensate for weight of an object, merge it with other object that provide lift | anti-weight |
| when it is necessary to perform an action with both harmful and useful effects; should be replaced with counteractions to control harmful effects | prior counteraction |
| perform the required change of an object in advance | prior action |
| prepare emergency means beforehand to compensate for the relatively low reliability of an object | cushion in advance |
| if an object has to be raised or lowewered, redesign the object's environment so theneed to raise or lower is eliminated or performed by the enivironment | equipotentiality |
| invert the action used to solve the problem | the other way round |
| move from flat surfaces to spherical ones and from parts shaped as a cube (parallelepiped) to ball-shaped structures | spheroidality-curvature |
| change the object (or outside environment) for optimal performance | dynamics |
| if you can't achieve100% of a desired effect, then go for more or less | partial or excessive action |
| more into an additional dimension - from one to two - from two to three | another dimension |
| cause an object to oscillate or vibrate | mechanical vibration |
| instead of continuous action, use periodic or pulsating actions | periodic action |
| carry on work without a break; all parts of an object constantly operating at full capacity | continuity of useful action |
| conduct a process, or certain stages of it at high speed | rushing through |
| use harmful factors to achieve a positive effect | blessing in disguise |
| introduce feedback to improve a process or action | feedback |
| use an intermediary carrier article or intermediary process | intermediary |
| an object must service itself by performing auxilary helpful functions | self-service |
| replace unavailable, expensive or fragile object with available inexpensive copies | copying |
| replace an expensive object with a multiple of inexpensive objects, comprising certain qualities, such as service life | cheap short-living objects |
| replace a mechanical system with a sensory one | replace mechanical system |
| use gas and liquid parts of an object instead of solid parts | pneumatics and hydraulics |
| use flexible shells and thin films instead of 3D structures | flexible membranes/thin films |
| Make an object porous or add porous elements (inserts, coatings, etc.) | porous materials |
| Change the colour of an object or its external environment | color change |
| Objects interacting with the main object should be of same material (or material with identical properties) | homogeneity |
| After completing their function (or becoming useless) reject objects, make them go away, (discard them by dissolving, evaporating, etc) or modify during the process | Discarding and Recovering- |
| change the physical state (e.g. gas to liquid to solid) | parameter change |
| Use phenomena of phase transitions (e.g. volume changes, loss or absorption of heat, etc.) | Phase Transition |
| Use thermal expansion, or contraction, of materials | thermal expansion |
| Replace a normal environment with an inert one | Inert atmosphere |
| Change from uniform to composite (multiple) materials | Composite materials |
Created by:
savelae