time to failure?
time to failure?
(OP)
hi friends:
what is mean time to failure?
best regards
what is mean time to failure?
best regards
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: time to failure?
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: time to failure?
They are derived from the exponential statistical model that assumes the failure rate for a device or system is constant. (Plenty of info on the web on this.)
This is supposed to be the case for a pure electronics system during its usefule life period. I.e the flat part of the bathtub curve.
if the system has mechanical devices like hard drives and fans that have wearout mechanisms then it becomes a different ball game. I do calcs on set top boxes as part of my job and just the fan and HDD can be half the total failure rate!
See my email on modern MTBF predictions using HTOL test data for semiconductors.
analogue alan
RE: time to failure?
RE: time to failure?