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5.1.1. TRIZ Principles: Function

How To Invent (Almost) Anything > 5. Basic TRIZ > 5.1. TRIZ Principles > 5.1.1. TRIZ Principles: Function

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All parts of a device perform functions. Whenever something happens, a function has been performed. There are primary functions, which perform the main desired effects, and secondary functions, which support the primary functions (note the similarity with primary and secondary functions of Value Analysis in Chapter 1).

To find out what is happening, you can use chunking (as in Chapter 1) to either zoom in to the detail (even to the molecular level) or out far enough to see the big picture.

To identify functions, look at what is being done and the results of those actions. Results of an action produce change of some sort, which hopefully is what is required. To assess the change, it should be measurable, which means it will have a value and units, such as of heat, shape, motion, energy, etc.
 

Other principles

• 5.1.1. TRIZ Principles: Function
• 5.1.2. TRIZ Principles: Harm
• 5.1.3. TRIZ Principles: Ideality
• 5.1.4. TRIZ Principles: Trimming
• 5.1.5. TRIZ Principles: Substances and Fields
• 5.1.6. TRIZ Principles: Evolution
• 5.1.7. TRIZ Principles: Contradictions

Other sections in this chapter:

• 5.1. TRIZ Principles
• 5.2. Using Contradictions and Principles
• 5.3. Simplifying TRIZ Principles
• 5.4. TRIZ Thinking

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