M
mickng
Hi, I am start teaching FMEA since 2002 ( from FMEA 3rd Edition to 4th Edition ). But there is still an arguement on Loss of secondary function (vehicle operable, but comfort /convenience functions inoperable)
( as refer to Severity Table ).
Lets take an example failure - Air Condition not functioning. Herewith some TS auditors' comment.
Auditor 1
From Customer Effect - you should rate it under 8 because loss the primary function of air condition even vehicle is operable ( but it against the 4th edition table ).
Auditor 2
From Customer Effect - you should rate it under 6 because loss of secondary function and vehicle is operable. Air Condition is only Secondary function for the vehicle. In other words, unless you are designing engine parts otherwise the failure only can reach as high 6 )
Auditor 3
ANYTHING ALSO POSSIBLE, it depends........ ( Seem like not answering at all ).
NOW, my question is.... when we are designing an System or Sub System or Component, do we look at the failure of its own or whether failure to the vehicle? If failure of its own, then it should be rated 8 as primary function is loss but if failure to the vehicle, then it should be rated 6 as it is considered as secondary function to the vehicle ( off course, except engine itself )..
What do you think as an expert? Please give your solid comment ( not again like.... it depends.... ).
( as refer to Severity Table ).
Lets take an example failure - Air Condition not functioning. Herewith some TS auditors' comment.
Auditor 1
From Customer Effect - you should rate it under 8 because loss the primary function of air condition even vehicle is operable ( but it against the 4th edition table ).
Auditor 2
From Customer Effect - you should rate it under 6 because loss of secondary function and vehicle is operable. Air Condition is only Secondary function for the vehicle. In other words, unless you are designing engine parts otherwise the failure only can reach as high 6 )
Auditor 3
ANYTHING ALSO POSSIBLE, it depends........ ( Seem like not answering at all ).
NOW, my question is.... when we are designing an System or Sub System or Component, do we look at the failure of its own or whether failure to the vehicle? If failure of its own, then it should be rated 8 as primary function is loss but if failure to the vehicle, then it should be rated 6 as it is considered as secondary function to the vehicle ( off course, except engine itself )..
What do you think as an expert? Please give your solid comment ( not again like.... it depends.... ).