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Tag: Survival

  • MTTF is the area under the reliability curve

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    by

    Murray Wiseman
    in

    The reliability curve, also known as the survival graph eventually approaches 0 as time goes to infinity. How do we show that the area below the reliability curve is equal to the mean time to failure (MTTF) or average life of the item? We would like to show that the expected or average life of an…

  • Warranty for haul trucks

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    by

    Murray Wiseman
    in

    You have a fleet of 60 haul trucks. You have been told by the OEM that they allocate 5% of the purchase price to cover repairs during the warranty period. The rationale for this is that the warranty is meant to cover infant mortality failures, with the purpose of indemnifying the owner against manufacturing defects…