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Discussion

Setting a tolerance by measuring accepted and rejected production is described as

  • A.adopting the just noticeable difference as the working tolerance
  • B.using the instrument manufacturer's default value
  • C.taking the tolerance from an international standard
  • D.deriving the tolerance from historical acceptance decisions

Answer: D

It grounds the number in what the customer has actually accepted before. Purely theoretical tolerances frequently prove impractical in production. Historical acceptance grounds the number in reality. Theory alone frequently proves impractical.

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