TRIZ is built on the idea that someone, somewhere, has already solved your problem (or one very similar to it).
The heart of any problem. A contradiction occurs when improving one thing makes another worse (e.g., making a phone screen larger but keeping the device light). TRIZ For Dummies
The goal of every system. An "ideal" system provides all benefits with zero costs or harms—essentially solving the problem without adding complexity. TRIZ is built on the idea that someone,