Systems fail because they have faulty or poorly matched parts, are used
in ways that exceed what was intended by the design, or were poorly designed
to begin with. The most common ways to prevent failure are pretesting parts
and procedures, overdesign, and redundancy.
| NSES Content Standard E
Science and Technology: Abilities of technological design Grades 5-8, page 165 Evaluate completed technological designs or products. Students should use criteria relevant to the original purpose or need, consider a variety of factors that might affect acceptability and suitability for intended users or beneficiaries, and develop measures of quality with respect to such criteria and factors; they should also suggest improvements and, for their own products, try proposed modifications. NSES Content Standard E
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