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To be honest, even though I appreciate the effort here, I don't understand what the point is..
Second chart says that, as the part gets more use, the probability of it failing increases. Well we know that. Also, there is major 'undetermined' bias in the population of the data, where we don't know who we are not hearing from and who we really are hearing from (driver/maintenance etc habits, part specifics such as which cnc it was built in - long story there but I have seen failures of identical parts being produced in multiple cnc's and having different life due to placement of the cnc in the factory (i.e. exposed to afternoon sun or not).
So no offense or anything but unless the sample size is near 1% of N52s I would not draw any conclusions.
Btw, I am at 113k and no failure yet.
Cheers.
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