Real-World Problems

Problem: Manufacturers want to reduce aluminum to cut cost and environmental impact, but the can must still withstand internal pressure and the stacking load in warehouses.

Contradiction: Less material (thinner walls) ↔ Strength must stay the same or increase.

TRIZ Solution: Instead of relying on wall thickness, geometry carries the load: a domed concave bottom, cylindrical body, and rolled seams. Today's cans are several times thinner than early designs yet still handle pressure and stacking forces.

Problem: Thick ketchup flows slowly; users must shake and tap the bottle, and the last portion is always hard to get out.

Contradiction: Thickness signals quality ↔ Convenience of pouring.

TRIZ Solution: Invert the situation: instead of making users flip the bottle, keep the bottle permanently flipped. The bottle stands on its cap, combined with a self-sealing silicone valve - the ketchup is always waiting at the opening, ready with a gentle squeeze.

Problem: Urban commuters need a bicycle large enough to ride comfortably, yet it must fit on trains, in elevators, and in small apartments.

Contradiction: Size in use ↔ Size in transport and storage.

TRIZ Solution: Split the frame into hinged segments with a collapsible handlebar and seat post. One bicycle exists in two states: full-sized when riding, one third the size when folded.

Problem: An aircraft needs wheels for takeoff and landing, but exposed landing gear creates enormous drag in flight and wastes fuel.

Contradiction: Wheels must exist (takeoff/landing) ↔ Wheels must not exist (in flight).

TRIZ Solution: Separate the contradiction in time: the landing gear appears only when needed. After takeoff, the entire assembly folds and retracts inside the fuselage - one object nested inside another.

Problem: Crowded banks and hospitals: customers stand in exhausting lines, space gets congested, and disputes break out over queue positions.

Contradiction: Fair first-come-first-served order ↔ Customers do not want to stand and wait in place.

TRIZ Solution: Separate the "order" from the "people": customers take a numbered ticket on arrival, then sit freely or do something else. The queue still exists, but as information instead of a line of people - a classic example of Enlarged TRIZ applied to service management.