On 31 Mrz., 01:08, "Trs80" <tr...@[EMAIL PROTECTED]
> wrote:
> If given MTBF and standard deviation can the reliabilty be predicted at
a
> defined operational range using Excels Normaldistribution?
>
> say mtbf = 50, sd= 20, the plug in the operating duration.
> NORMDIST(operating duration, 50, 20, true).
> Is that a way to calculate reliability at a specifed duration?
> thanks!
Failure should be a rare event and I'd rather model it with the
Poisson distribution.
If reliability is 1-P(at least one failure) then reliabilty is simply
of the form exp(-c*duration)
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