Re: Pi-FAN for RPi4 with 4 (instead of 3) cables?

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.

https://www.vitecpower.com/technische-daten/the-difference-between-mtbf-and-lifetime/
https://www.rs-online.com/designspark/why-l10-life-expectancy-is-key-for-fan-durability-over-mtbf-ratings
https://www.digi.com/support/knowledge-base/understanding-mtbf-mean-time-between-failures

cu
Michael
--
Some people have no respect of age unless it is bottled.