There is no perfect design. Designs that are best in one respect (safety or ease of use, for example) may be inferior in other ways (cost or appearance). Usually some features must be sacrificed to get others.
Learning Goal 2
Even a good design may fail. Sometimes steps can be taken ahead of time to reduce the likelihood of failure, but it cannot be entirely eliminated.
Learning Goal 3
The solution to one problem may create other problems.
Issues in Technology
For Grades: 3-5
Learning Goal 4
Factors such as cost, safety, appearance, environmental impact, and what will happen if the solution fails must be considered in technological design.