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A surrogate model in design optimisation is

  • A.A competitor's aircraft used for comparison
  • B.The final production design
  • C.A cheap fit to expensive analyses
  • D.A physical scale model

Answer: C

Fitting a response surface to a modest number of high-fidelity runs allows the optimiser to search thousands of points at negligible cost. Its accuracy holds only within the region sampled, so the fit must be checked before its predictions are trusted.

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