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Discussion

Production test of an assembled unit exists chiefly to

  • A.verify that the design meets its requirements
  • B.measure the electromagnetic emissions of each individual unit
  • C.establish the mean time between failures
  • D.find manufacturing faults rather than design faults

Answer: D

The design has already been proved; what varies from unit to unit is the solder joint, the wrong component and the damaged device. The test therefore has to be quick, comprehensive against assembly faults and cheap to run on every unit.

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