Calculating MTBF (Mean Time Between Failures) of different Electronic Components.

[Sherin MR]

Hi,
Can anyone please guide me in calculating MTBF of different electronic components.What are the parameters required for calculating the MTBF?
Can anyone please respond to this as it is quite urgent.........

Regards,
Sherin MR.

[harry]

Welcome Sherin,

First, you must titled your thread appropriately. The moment MTBF appears in your title (I edited it), the software will lead you to similar threads found in the 'similar discussion threads box' below your post. These will lead you to other relevant threads without the need to do a search.

A good reference is MIL-HDBK-217F.

Mean_time_between_failures is also a good resource for this topic.

MTBF Calculation Tutorial

Online Reliability calculator

[Sherin MR]

Hi
Am sorry.
I have visited this sites before (WIKI,MTBF Calculation tutorial).
But there are no guidelines to use it.
Can u please give me some information from where i can get it.


Regards
Sherin.

[harry]

Have you done a search here?

Have you gone through this thread? Calculating MTBF for an electrical component

[harry]

Originally Posted by Sherin MR

Hi
Am sorry.
I have visited this sites before (WIKI,MTBF Calculation tutorial).
But there are no guidelines to use it.
Can u please give me some information from where i can get it.


Regards
Sherin.

I am not sure what you meant by it. Do you mean that you do not have basic data or understanding of this concept? Or you may want to try a google search.

Otherwise look at MIL-HDBK-217F. (link provided in post #2)

[Sherin MR]

Hi
I meant that i dont know how to use this MTBF calculator.
There are no guidelines shown how to use this MTBF calculator.
Regards
Sherin

[w_grunfeld]

Originally Posted by Sherin MR

Hi
I meant that i dont know how to use this MTBF calculator.
There are no guidelines shown how to use this MTBF calculator.
Regards
Sherin

In principle all prediction methods are the same: you start off with a basic generic base FR per part type and then you have to multiply it by a series of Pi's (coefficients) for environment, temperature, voltage, stress, quality level and so on..... depending on each type of component. The methodology is spelled out in MIL-HDBK-217 ...it's hundreds of pages...You can't expect the formula for each component to be posted in a forum...

By the way MIL-HDBK-217 is obsolete, replaced by 217 Plus, plus others like Telecordia.
No one uses manual methods anyway....Get yourself a computerized tool unless you have to calculate for 3-4 components...
Willy

[Sherin MR]

Hi
I went thru the MIL-HDBK and found different parameter like
*base failure rate
*temperature factor
*power factor
*power stress factor
*quality factor
*environment factor
*capacitance factor
*voltage stress factor
*series resistance factor
Can anyone say from where I could get more information about this factors?
I searched in GOOGLE but didnot get any information that I require.
Please anyone respond to this.
Regards
Sherin.