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Discussion

Which statement about design phases is TRUE?

  • A.Fidelity rises as breadth falls
  • B.Both fidelity and breadth rise together
  • C.Detail design examines the most configurations
  • D.Conceptual design uses the highest-fidelity methods

Answer: A

Correct answer: Fidelity rises as breadth falls

This is the fundamental shape of the process. Conceptual design examines many configurations with fast, approximate methods; preliminary design narrows to one and applies wind tunnel testing and structural analysis; detail design works on that single configuration in complete detail. Breadth and fidelity trade against each other because the effort per configuration rises as the number falls, and a programme that tried to do both at once would never finish the first sweep.

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