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Cpk on Hardness

Discussion in 'Capability - Process, Machine, Gage …' started by Warren Mason, Jul 12, 2019.

  1. Warren Mason

    Warren Mason New Member

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    Is it possible to get a Cpk above 1.67 when your spec is only 58 - 62 HRC????? If so how?
     
  2. Miner

    Miner Moderator Staff Member

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    Highly unlikely. You would have to be on target with a standard deviation around 0.3. This means almost all measurements would have to be 60, with only a few measuring 59 and 61 and almost none measuring 58 or 62.

    Measurement error alone would make this difficult, let alone within material variation.
     
    Bev D likes this.

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