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Started: 1/3/2018 3:12 PM
Picture Placeholder: KETTLY JOSEPH
KETTLY JOSEPH
MTBCF VS MTBF

Can MTBCF (Mean Time Betwen Critical Failure)  be greater than MTBF (Mean Time Between Failure) assuming same system, temperature and environment?

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  • KETTLY JOSEPH
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KETTLY JOSEPH

Can MTBCF (Mean Time Betwen Critical Failure)  be greater than MTBF (Mean Time Between Failure) assuming same system, temperature and environment?

41/3/2018 3:12 PM1/3/2018 3:12 PMNoAsk the Community
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11/3/2018 3:09 PM
Edited: 1/4/2018 10:17 AM
Picture Placeholder: JOHN BOYCE
JOHN BOYCE

Joseph,

Typically MTBCF is a subset of MTBF since every system failure is not considered critical.  Therefore, the MTBCF value would be larger than the MTBF value.  If every system failure has been defined as critical then MTBCF and MTBF would be the same.  MTBF will never be greater than MTBCF

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  • JOHN BOYCE
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JOHN BOYCE

Joseph,

Typically MTBCF is a subset of MTBF since every system failure is not considered critical.  Therefore, the MTBCF value would be larger than the MTBF value.  If every system failure has been defined as critical then MTBCF and MTBF would be the same.  MTBF will never be greater than MTBCF

KETTLY JOSEPH2401/4/2018 10:14 AM1/4/2018 10:17 AM
1/4/2018 10:06 AM1
KETTLY JOSEPH
Posted: 1/5/2018 10:45 AM
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KETTLY JOSEPH

Thank you. That was my conclusion also. However someone told me MTBCF is looking at redundant circuitry whereas MTBF Take cares of series circuitry. Therefore MTBCF could sometime be greater than MTBF. I just could not think of any example that could make that statement true.

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KETTLY JOSEPH

Thank you. That was my conclusion also. However someone told me MTBCF is looking at redundant circuitry whereas MTBF Take cares of series circuitry. Therefore MTBCF could sometime be greater than MTBF. I just could not think of any example that could make that statement true.

KETTLY JOSEPH2401/5/2018 10:45 AM1/5/2018 10:45 AM
1/3/2018 3:09 PM
Posted: 1/5/2018 10:49 AM
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KETTLY JOSEPH

In Fact we Have 2 customers who sent us proposal with MTCBF lower than MTBF. Before correcting them i wanted to make sure there are no instances where MTBF could be larger than MTBCF.

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  • KETTLY JOSEPH
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KETTLY JOSEPH

In Fact we Have 2 customers who sent us proposal with MTCBF lower than MTBF. Before correcting them i wanted to make sure there are no instances where MTBF could be larger than MTBCF.

KETTLY JOSEPH2401/5/2018 10:49 AM1/5/2018 10:49 AM
1/3/2018 3:09 PM
Posted: 1/24/2018 10:54 AM
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ROBERT SCHULTZ

This also holds true for MTTR (Mean Time To Repair); there will never be an instance when a Maintenance/Repair value is larger than the program level MTTR.  

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ROBERT SCHULTZ

This also holds true for MTTR (Mean Time To Repair); there will never be an instance when a Maintenance/Repair value is larger than the program level MTTR.  

KETTLY JOSEPH2401/24/2018 10:54 AM1/24/2018 10:54 AM
12/1/2017 8:30 AM

 

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