As the prototypes are tested, failures occur and, in fact, are desired so that the product's design can be made more reliable.
A product's design can be improved with prototype testing.
Prototype failures usually mean the product will never work.
Everyone is outside.
Humans in a school
You show how deep the opinions are.
When they take time off they have to start over again after.
It's insignificant to weight information
The workers are on lunch break.