Page 1 of 3 123 LastLast
Results 1 to 10 of 24

Thread: My opinion about MTBF

  1. #1
    Join Date
    Jul 2018
    Location
    Russia
    Posts
    81
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default My opinion about MTBF

    You can add more information about "robustness" ("reliability"). MTBF information and vendor warranties should help evaluate quality/reliability. Presence of simultaneous 100 000+h MTBF and 10+y warranty can be considered an indicator of hi-reliability.
    Example. If 100,000h MTBF is claimed & 5y warranty then device reliability is in doubt.
    Last edited by And_corp; 02-05-2020 at 06:53 PM.

  2. #2
    Join Date
    May 2010
    Location
    Missouri; USA
    Posts
    5,121
    Thanks Thanks Given 
    422
    Thanks Thanks Received 
    31
    Thanked in
    24 Posts

    Default

    MTBF numbers are made up bullshit. They really don't reflect anything in the real world.

  3. #3
    Join Date
    Jul 2018
    Location
    Russia
    Posts
    81
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    I propose to consider at the same time a warranty and MTBF.
    These two values ​​already make a decision. Just consider them at the same time.
    Real AFR is not available for retail customers. Forced to evaluate reliability by other means.
    Example
    Corsair PSU with 100000h MTBF (>11y) + 10y guarantee - good robustness
    Seasonic PSU with 150000h MTBF (>17y) + 12y guarantee - good robustness
    Super Flower with 100000h MTBF (>11y) + 7y guarantee - hm...

    Is my idea viable?
    Last edited by And_corp; 02-06-2020 at 01:40 AM.

  4. #4
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,547
    Thanks Thanks Given 
    387
    Thanks Thanks Received 
    165
    Thanked in
    127 Posts

    Default

    No, it's not, just look at some more power supplies.

    Every Corsair PSU has a MTBF of 100.000 hours, even the VS series.

    With Seasonic they just give the Prime 150.000 hours and everything else 100.000 hours. Even the Focus based Prime Ultra power supplies get 150.000 hours, while the same PSU with Focus label only gets 100.000 hours. And they also excluded the fan in the MTBF.

    It's just a number based on nothing in consumer products.

  5. #5
    Join Date
    Jul 2018
    Location
    Russia
    Posts
    81
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Quote Originally Posted by -The_Mask- View Post

    It's just a number based on nothing in consumer products.
    But the warranty period is always less than MTBF.
    Warranty period adjusted by AFR.
    AFR is also directly related to the warranty period. Vendors make decisions based on AFR & MTBF. IMHO
    Changing the warranty period for Seasonic (10->12) and Corsair (7->10) due to accumulation of AFR statistics.
    Example: TURBO COOL SERIES TC860X. MTBF 150000 (>17y) but warranty 7y. Why is that?
    My answer: statistics are not compiled & vendor is afraid
    Last edited by And_corp; 02-06-2020 at 04:32 AM.

  6. #6
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,547
    Thanks Thanks Given 
    387
    Thanks Thanks Received 
    165
    Thanked in
    127 Posts

    Default

    Sure they make a logical decision about the selling price, they should be able to carry the warranty. But we don't get to see those numbers. We only get the bull shit MTBF number.

  7. #7
    Join Date
    Jul 2018
    Location
    Russia
    Posts
    81
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    MTBF & Warranties Combine = Potential Reliability.
    Wrong conclusion?
    Last edited by And_corp; 02-06-2020 at 05:06 AM.

  8. #8
    Join Date
    Aug 2014
    Location
    Poland
    Posts
    1,032
    Thanks Thanks Given 
    346
    Thanks Thanks Received 
    46
    Thanked in
    30 Posts

    Default

    Quote Originally Posted by And_corp View Post
    MTBF & Warranties Combine = Potential Reliability.
    Wrong conclusion?
    Wrong conclusion, because there is neither correlation nor causation between those things. - like the two people above said.

  9. #9
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,547
    Thanks Thanks Given 
    387
    Thanks Thanks Received 
    165
    Thanked in
    127 Posts

    Default

    Warranty simply has nothing to do with quality, there is no correlation.

  10. #10
    Join Date
    Oct 2017
    Location
    Grand Junction, CO
    Posts
    2,265
    Thanks Thanks Given 
    133
    Thanks Thanks Received 
    76
    Thanked in
    69 Posts

    Default

    Would a manufacturer risk a long warrantee if the failure rate was high?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •