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Discussion

The overall shape of the conceptual design process is best described as

  • A.Broad and exact throughout
  • B.Narrow at first, then broadening
  • C.Broad and rough, then narrow and exact
  • D.Narrow and exact throughout

Answer: C

Correct answer: Broad and rough, then narrow and exact

Conceptual design surveys a wide field of configurations with fast, approximate methods, because the object is to choose well rather than to compute precisely. As the field narrows the methods deepen, until detail design treats a single configuration exactly. The reverse order is impossible: high-fidelity analysis of every candidate would exhaust the schedule before the configuration was chosen, and precision applied to the wrong concept buys nothing.

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