> From: Mel Beckman <m...@beckman.org>
> Sent: Wednesday, January 16, 2019 9:21 PM
> 
> MTBF can’t be used alone to predict failure probability, because product
> mortality follows the infamous “bathtub curve”. Products are as likely to fail
> early in their lives as later in their lives. MTBF as a scalar value is just 
> an
> average.
> 
Yes very good point -however that's where the historical data should come to 
rescue to help bend the MTBF line into this expected "bathtub curve". 
 

adam

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