[c-nsp] MTBF for Cisco products

[Ted Mittelstaedt]

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of Peter Rathlev
> Sent: Monday, December 03, 2007 3:05 PM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] MTBF for Cisco products
>
>
> jay at west.net skrev man, 03 dec 2007:
> > Ted Mittelstaedt wrote:
> >> (assuming a standard bell curve applies to device failures, which
> >> it generally does)
> >
> > Actually, hardware failures generally follow a "bathtub curve", almost
> > an inverse bell curve.  There is a certain amount of infant mortality
> > where substandard parts will fail immediately or shortly after
> > installation, bad connections and other mechanical and assembly issues
> > are discovered or fail in transit, etc.  Then relatively few failures
> > for a long time, and then a gradual ramping up of failures as things
> > wear out, capacitors dry up, etc.
>
> I think you both agree with each other. The "Bell curve" would
> describe the age of the devices

(age of device when it fails)

Ted
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