Theory of Inventive Problem Solving (triz)


TRIZ: The Theory of Inventive Problem Solving



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3.0 TRIZ:

The Theory of Inventive Problem Solving


There are a number of laws in the theory of TRIZ. One of them is the Law of Increasing Ideality. This means that technical systems evolve toward increasing degrees of ideality, where ideality is defined as the quotient of the sum of the system's useful effects, Ui, divided by the sum of its harmful effects, Hj.

Useful effects include all the valuable results of the system's functioning. Harmful effects include undesired inputs such as cost, footprint, energy consumed, pollution, danger, etc. The ideal state is one where there are only benefits and no harmful effects. It is to this state that product systems will evolve. From a design point of view, engineers must continue to pursue greater benefits and reduce cost of labor, materials, energy, and harmful side effects. Normally, when improving a benefit results in increased harmful effects, a trade-off is made, but the Law of Ideality drives designs to eliminate or solve any trade-offs or design contradictions. The ideal final result will eventually be a product where the beneficial function exists but the machine itself does not. The evolution of the mechanical spring-driven watch into the electronic quartz crystal watch is an example of moving towards ideality.




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