4 ms·
Most hardware has an exponential (memoryless) failure distribution in practice. The bathtub curve is a myth.
by lmm 2mo ago
Most hardware has an exponential (memoryless) failure distribution in practice. The bathtub curve is a myth.
- fc417fc802 2mo agoA bathtub curve is also memoryless though, and the back portion can be exponential. Consider two sub-populations of the same hardware. The first is small, evaded QA, and will fail early. Failures follow an exponential fall off. The second is much larger and failures rise exponentially with age. Also consider mixing in "was dropped during shipping" or "was stored improperly".
- eru 2mo agoHow is a bathtub curve memoryless?
- fc417fc802 2mo agoMy mistake, it seems I misunderstood what OP meant by that. Ignore that semantic detail and my position still stands. You've got a mix of subpopulations and many of the failure modes are definitely time dependent in some manner at least in the real world.
- eru 2mo agoNo worries. I just thought I was misunderstanding something.
- Xalutiono 2mo agoWhere is this exponential thing coming from? Why would hardware failure raise exponential with linear scale? Doesn't make sense
- eru 2mo ago> Where is this exponential thing coming from? That's what you get from a constant failure rate per unit of time. It's saying that hardware fails in the same way that Carbon-14 dating works.