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 T RIZ POWER T OOLS 

Function Writing

xercises These Exercises begin with simpler functions and

 progress to “confusing functions”. The rules to function writing are found in the appendix to“TRIZ Power Tools—Job #5 Resolving Problems” 

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Everyday Language | Functional Language

Everyday Language | Functional Language

The BallBreaks theGlass

?

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Everyday Language | Functional Language

Everyday Language | Functional Language

Ball

Glass

Breaks

(changes # pieces)

The BallBreaks theGlass

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Everyday Language | Functional Language

Everyday Language | Functional Language

?The bearingholds therod 

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Everyday Language | Functional Language

Everyday Language | Functional Language

Bearing

Rod 

Holds /

Constrains(ControlsPosition)

The bearingholds therod 

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The pipe

conductsthe liquid 

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Everyday Language | Functional LanguageEveryday Language | Functional Language

Pipe

Liquid 

Conducts

(Controls path)

The pipe

conductsthe liquid 

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The wire

conductselectricity

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Everyday Language | Functional LanguageEveryday Language | Functional Language

Wire

Charges

Conducts(controls path)

Fuzzy Term

The wire

conductselectricity

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The cap

seals the bottle

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Everyday Language | Functional LanguageEveryday Language | Functional Language

The cap

seals the bottle

Cap

Liquid 

Constrains

(Controls position)

Bottle

Constrains(Controls position)

Constrains(Controls position)

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The

lighteningrod protectsthe house

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Everyday Language | Functional LanguageEveryday Language | Functional Language

Rod 

Charges

Conducts

(changes path)

The

lighteningrod protectsthe house

House

Damage

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The

Thermometermeasures thetemperature

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Everyday Language | Functional LanguageEveryday Language | Functional Language

Liquid 

Glass

Cools

The

Thermometermeasures thetemperature

Mercury

Cools

Observer 

Informs

Positions

Heats

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Everyday Language | Functional LanguageEveryday Language | Functional Language

The goldimproves the

reliability

Shown is a slidingcontact switch. Goldcoats the switch arm

and the contacts thatstick up.

?

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Everyday Language | Functional LanguageEveryday Language | Functional Language

Gold 

Charge

Conducts(controls the

 path)

The gold

improvesthereliability

Conductors

Holds(controls the

Position)

Oxy /H20

Stops

(controls thePosition)

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The paint

stopsdeterioration

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Everyday Language | Functional LanguageEveryday Language | Functional Language

The paint

stopsdeterioration Paint

Holds(controls the

Position)

Oxy /H20

Stops(controls the

Position)

Wood 

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Everyday Language | Functional LanguageEveryday Language | Functional Language

The

toothbrush brushes theteeth

?

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Everyday Language | Functional LanguageEveryday Language | Functional Language

 bristles

Plaque/food particles

Disturbs

(changeslocation)

The

toothbrush brushes theteeth

Teeth

Holds

(Controlslocation)

Guides

(ControlsPath)

HandlePositions

User  Positions

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Everyday Language | Functional LanguageEveryday Language | Functional Language

?The Oil

Lubricatesthe piston

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Everyday Language | Functional LanguageEveryday Language | Functional Language

The Oil

Lubricatesthe piston

Oil

Piston

Guides(controls

 path)

Positions(Controls

Position)Bore

Restrain(Friction)