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5.1.6. TRIZ Principles: Evolution


How To Invent (Almost) Anything > 5. Basic TRIZ > 5.1. TRIZ Principles > 5.1.6. TRIZ Principles: Evolution

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TRIZ invites you to think about how devices and systems evolve. There are a predictable patterns of evolution that can be used as a focus for attention, as follows:

Increasing ideality. The ideality of a system is defined as the sum of its useful effects divided by the sum of its harmful effects. The system can thus be evolved through increasing its benefits or by decreasing factors that either cause problems or add no significant value.

Improving interfaces. Parts of the system work together better through improvements in the substance-field relationships.

Harmonization. Where the system involves multiple vibrations or oscillations of any kind, unless they are harmonized, they will interfere with one another. This can include such as drills that vibrate at the harmonic frequencies of the target materials.

Completing the system. All systems have a source of energy, parts that use the energy to deliver the function of the system, a way of channelling the energy to the delivery function and a control system. A weakness in any of these may limit the whole system. The energy delivery system in particular can be problematic and is the subject of many patents.

Increasing dynamism. Things that were fixed tend to become movable, to eliminate problems of them being fixed or to increase flexibility. For example, in aircraft, undercarriage became retractable and wings movable.

Inward focus. As the larger systems problems are resolved, remaining problems tend to be at increasingly levels of detail. With physical problems, you thus tend to end up at the atomic level (which you can, of course, go directly to with simple science of Chapter 2).

Extending the system. When a system has reached its ideality limit, further improvement can be achieved by combining it with other systems or adding new parts.

Other principles

Other sections in this chapter:

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