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Match each estimation class in List I with its basis in List II.

List I

A. Class I

B. Class II

C. Class III

D. Measured weight

List II

1. Statistical formulae per major group

2. Aircraft-level historical fractions

3. Weighing the completed article

4. Computed from defined parts and materials

Select the correct match.

  • A.A-2, B-4, C-1, D-3
  • B.A-3, B-1, C-4, D-2
  • C.A-2, B-1, C-4, D-3
  • D.A-1, B-2, C-4, D-3

Answer: C

Fidelity rises through the sequence as the design firms up, and each level costs more effort than the last. Using a high-fidelity method before the design supports it wastes work on a configuration that may not survive.

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