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Discussion

The closing lesson of this topic is that

  • A.Precision at every stage is what matters
  • B.Configuration choice can be deferred safely
  • C.Analysis fidelity should be maximised from the outset
  • D.Choosing well beats analysing precisely

Answer: D

Correct answer: Choosing well beats analysing precisely

The whole shape of conceptual design follows from this. The configuration chosen here commits most of the lifetime cost, and no amount of later precision can recover a poor choice; conversely a good configuration analysed roughly will still be a good aircraft once the analysis deepens. Hence fast approximate methods applied across many candidates, assumptions recorded so they can be tested, and the fidelity reserved for the phases in which the choice is already made.

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