Yev here -> It's less of an algorithm and more of a purchasing department with lots of spreadsheets that tie into the AFR data as a data point - but yes, it's possible we could automate it, but there's some factors that our supply-chain team would need to be involved in anyway (like vendor diversity, no large batches of single drives etc...) that make outputting that algorithm a bit harder.

I was wondering this as well, it seems pretty easy to write.

Also, if you don't use one, please elaborate if you can why the obvious MTBF delta projection idea is bunk. I'm sure your talented team has thoroughly thought through all of this