Attachment is failure rate for one material from different lot which was built in different timeframe, how to use JMP to predict the long term upbound failure rate?

Jack_Tang — Tue, 04 Jul 2023 13:22:47 GMT

Re: Attachment is failure rate for one material from different lot which was built in different timeframe, how to use JMP to predict the long term upbound failure rate?

dale_lehman — Wed, 05 Jul 2023 13:07:35 GMT

Can you provide some more detail? Are the lots in chronological order (time series) or are they just sorted from high to low failure rates? I suspect it is the former in which case you can try to fit time series models to this data. On the other hand, just a graphical exploration may be sufficient. I find that a simple power function fits this data quite well (failure rate = 57813*time^-0.668). Graphically, assuming this is a time series, the failure rate appears to be stabilizing and the long-run prediction from that power function might be appropriate - but I'd need more information to know if that makes any sense).

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Attachment is failure rate for one material from different lot which was built in different timeframe, how to use JMP to predict the long term upbound failure rate?

Re: Attachment is failure rate for one material from different lot which was built in different timeframe, how to use JMP to predict the long term upbound failure rate?