LMZ14201H: MTBF Methodology

Hi Kyle,

I will check internally and get back to you.

Regards

Arpita

Arpita,

Thank you for your response.

Could you provide any further clarification on which method of Telcrodia SR-332 was used (Method I, II, or III)? 

I am assuming that SR-332, Issue 3, Method II was used, as on the reliability data spreadsheet available online there seems to be testing data to support the MTBF calculation.

It seems to me as if the data is from a laboratory test and not from real application of the product, which would exclude Method III. Further, the existence of any testing data at all would seem to exclude the possibility that only Method I was used, which leads me to assume it was Method II.

Please let me know if you can confirm these assumptions or clarify anything. Thank you again for your help.

Arpita,

We are calculating MTBF for one of our products. For simple components such as resistors and capacitors we can reference standard documents and do the calculations ourselves. However, for more complex off-the-shelf parts, we do not have knowledge of the precise electronic components that make up that part, and so we must rely on internal calculations from the manufacturers. We have found that different vendors/manufacturers use different reliability calculation methods, and since we cannot control which method they use, we are instead noting the methods used by manufacturers just for our internal records. That way, we can go back and say "The MTBF for [component] is [XX] provided to us by [manufacturer] using [reliability method]".

If it is known if Telcordia SR-332 Method I, II, or III was used, that's great. But if that info is not readily available or shareable, I understand. Thank you for your help.

-Kyle

Hey Kyle,

I will try to get those details and if I get those, I will get back to you.

Thank You