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Calculating eta, beta MTTBF for Warranty

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  • #42420

    R.M.Parkhi
    Participant

    I have a problem. Can any body guide me ?
    We are manufacturing abouy 12000 starter motors a month.For the first three months, there are no failures in the field.From 5th month to the 9th month every month 3 to 4 failures are reported from the field. From 10th month to 19th month every month additional 6 to 7 failures are reported. 20 th month onwards, 10 to 12 failures are reported every month till our warranty period of 36 months.
    I wish to calculate eta, beta & MTBF values from this data.
    I want advice how to do this.When I use Minitab, the programme does not respond ,since the failure no. are too small compared to the population.
    Thanking you in anticipation & with warm regards,
    Ramesh M. Parkhi (from India )

    0
    #133887

    Novice
    Participant

    Look up Winsmith. I have used this before for this type of Analysis

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