calculate MTBF
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From: Raveninghorde on 21 Jan 2010 10:06 How do you calculate MTBF?
From: Rich Webb on 21 Jan 2010 10:24 On Thu, 21 Jan 2010 15:06:10 +0000, Raveninghorde <raveninghorde(a)invalid> wrote: > >How do you calculate MTBF? For a component? For an entire system? 217 or Bellcore/Telcordia or ... The Wikipedia article isn't a bad place to start. If you're tasked with doing a full-up parts-stress reliability prediction analysis, good luck! -- Rich Webb Norfolk, VA
From: John Larkin on 21 Jan 2010 10:33 On Thu, 21 Jan 2010 15:06:10 +0000, Raveninghorde <raveninghorde(a)invalid> wrote: > >How do you calculate MTBF? Get the failure rate of each part (specified in FITS, failures per billion hours), add them up, take the reciprocal, multiply by a billion. John
From: Raveninghorde on 21 Jan 2010 11:35 On Thu, 21 Jan 2010 07:33:02 -0800, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >On Thu, 21 Jan 2010 15:06:10 +0000, Raveninghorde ><raveninghorde(a)invalid> wrote: > >> >>How do you calculate MTBF? > >Get the failure rate of each part (specified in FITS, failures per >billion hours), add them up, take the reciprocal, multiply by a >billion. > >John Thanks The National site is good and I found the info for the their parts. Microchip no luck, IR no luck. So where do you normally find the information? I suppose one also assumes perfect ESD procedures, and perfect lead free soldering.
From: Raveninghorde on 21 Jan 2010 11:43
On Thu, 21 Jan 2010 10:24:29 -0500, Rich Webb <bbew.ar(a)mapson.nozirev.ten> wrote: >On Thu, 21 Jan 2010 15:06:10 +0000, Raveninghorde ><raveninghorde(a)invalid> wrote: > >> >>How do you calculate MTBF? > >For a component? For an entire system? 217 or Bellcore/Telcordia or ... > >The Wikipedia article isn't a bad place to start. If you're tasked with >doing a full-up parts-stress reliability prediction analysis, good luck! For a lithium ion battery charger. My brief post was a cry of despair. I ship these by the hundred. Now a BIG US company wants them and I get asked for a bucket load of information. |