Posts Tagged ‘engineering’
The Great American Domino Effect Engineering Challenge
Tuesday, April 24, 2012
USA Science & Engineering Festival
WHAT is YOUR COMPUTERS MTBF?
Explained. You actually DO need this.
Failure rate: What is yours?
The failure rate of a system usually depends on time, with the rate varying over the life cycle of the system.
For example, an automobile’s failure rate in its fifth year of service may be many times greater than its failure rate during its first year of service.
( EXPECT is the operative word- LOL)
One does not EXPECTto replace an exhaust pipe, overhaul the brakes, or have major transmission problems in a new vehicle. Yes- BUT…
In practice, the mean time between failures (MTBF, 1/λ) is often used instead of the failure rate. This is valid if the failure rate is constant (general agreement in some reliability standards (Military and Aerospace) – part of the flat region of the Reliability bathtub curve , also called the “useful life period”.
The MTBF is an important system parameter in systems where failure rate needs to be managed, in particular for safety systems.
The MTBF appears frequently in the engineering design requirements, and governs frequency of required system maintenance and inspections.
In special processes called renewal processes, where the time to recover from failure can be neglected and the likelihood of failure remains constant with respect to time, the failure rate is simply the multiplicative inverse of the MTBF (1/λ).
A similar ratio used in the transport industries, especially in railways and trucking is ‘mean distance between failures’, a variation which attempts to correlate actual loaded distances to similar reliability needs and practices.
Failure rates are REALLY important factors in the computer industry.>
Just ask Gateway.
Example of : How often your Sweet little Computer MIGHT Crash and Burn…
Suppose it is desired to estimate the failure rate of a certain component. A test can be performed to estimate its failure rate. Ten identical components are each tested until they either fail or reach 1000 hours, at which time the test is terminated for that component. (The level of statistical confidence is not considered in this example.) The results are as follows:
Estimated failure rate is
or 799.8 failures for every million hours of operation
NOW YOU KNOW..
Ask your dentist or dental hygenist ( I know- I know you hate going to the dentist- eye roll) and REMEMBER- your Dentist MISSES YOU…
Ask your Dentist or hygenist if they ever have a sore or tired back at the end of the day.
I am SURE they do have tired and sore backs,
AND and they will be shocked and delighted that you even asked about them.
It’s not ALL just about you,bunky..
This is dental engineering at its best.
I just found out about this product.
And I really am very willing to state I had never thought about the physical consequences of the provider of your care- standing/eleaning over a chair 8 hours a day. .
Much more to come.
View and have pity on your poor dentist.He/she may be in pain too. http://www.youtube.com/watch?v=9GkbSC7OZNg