Subj : Re: Pi-FAN for RPi4 with 4 (instead of 3) cables?
To   : Michael Schwingen
From : Pancho
Date : Tue Dec 10 2024 22:14:42

On 12/9/24 13:47, Michael Schwingen wrote:
> On 2024-12-09, The Natural Philosopher <tnp@invalid.invalid> wrote:
>>> I was surprised you'd use MTBF for a component which is expected to
>>> steadily deteriorate due to wear and tear.
>>>
>>> I though MTBF was more a random failure thing.
>>>
>> No it isnt that at all.
>
> MTBF is a measure for the rate of failures *during normal lifetime* - ie.
>
> 1 / failure rate
>
> It is *not* the lifetime of a component. MTBF is a measure for failures
> during the flat part of the bathtub curve. Failures due to end of lifetime
> (like normal, not-premature wearout on a fan) are not part of MTBF.
>

Thanks Michael, very instructive. That clears up my misunderstanding. So
MTBF is a random type, rather than a wear type thing. You just have to
assume bits are replaced before they get old.

--- SoupGate-Win32 v1.05
 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)

.