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A test programme uses \( 2000 \) coupons, \( 200 \) elements, \( 20 \) sub-components and \( 1 \) full-scale article. This pyramid illustrates

  • A.Certification by analysis
  • B.A fatigue spectrum
  • C.The building block approach
  • D.A single-level test programme

Answer: C

Numbers fall and complexity rises as the pyramid is climbed, so that confidence built cheaply at coupon level supports the few expensive tests at the top. Composite certification relies on it far more heavily than metallic certification does.

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