Trying to Respond to All Questions and Comments Concerning MTBF
Over the past couple of days, like most days, have received questions and comments concerning MTBF. I do try to respond to all questions and acknowledge the comments.
Glad to help in anyway I can, so please feel free to send me your questions. Certainly do appreciate the supporting comments, or any comments for that matter.
Let’s take a look a few such discussion that occurred over the past two days.
Which Parts Count Method to Use Today?
I have a basic question and request you to clarify. Which method should i follow ( MIL 217 F or Telcordia) for MTBF and Failure rate calculations for Automotive application electronics part.
Thanks in advance !!
Neither – 217 is little more than a random number generator and is over 20 years old based on data and technology the is even older.
Telcordia is likewise little more than a random number generator concerning the expected future reliability performance, and based on telecommunication system failure data. Not suitable for automotive applications at all.
If you are simply comparing design options and not attempting to estimate future reliability field performance then use your own field data supplemented with vendor or internal testing data.
If trying to estimate field performance, parts count predictions is not the right tool.
So, was the an appropriate response or was I bit too harsh?
Directed to Calculate MTBF
Hello Fred,How are you and hope this email meets you well.Please I have a question concerning MTBF.Our international reliability department just sent us an updated memo for calculating MTBF for both operational units and standby units.I do not agree with their calculation because they divide the number of hours by the total number of failures.Please what do you think?Thanks for your help.
HI … ,
Again, was that the appropriate response? Did I miss something?
Someone That Wants to Learn More
Hi, I came across your “No MTBF” website on the internet, and would like to connect to your group, to learn more from experts and professionals in the field of Reliability Engineering. Thank You & Best Regards,
Thanks Fred! Thank you for all the great information you always give us!