Re: Measurement Uncertainty vs. Level of Certainty - ISO17025 para. 5.1.1
Couple of things.....
Measurement Uncertainty (ANS/ISO/IEC 17025 Clauses 5.1.1, 5.4.6.1, 5.4.6.2) is generally described (using Metrology methods and models) in the GUM, which is the Guide to the Expression of Uncertainty in Measurement, available as ISO GUM, or as ANSI/NCSL Z540-2-1997.....
Now.....
MU is basically divided into Type A and Type B. Type A is the statistically driven information, generally, the readings you get, that is, the measurements themselves.....
Type B on the other hand is non-statistically driven, and unfortunately has an INFINITE number of contributors. Put another way, a single system such as
FMEA may not be the ultimate answer.
We may be able to provide a bit more help if you give some detail of the application you have, whether for test or calibration.
Also, the first thing you should consider is obtainng training, both in ANS/ISO/IEC 17025 and in MU (assuming you have not yet obtained training). There is a link or two in the 17025 board and the training board (posts by me and others also I believe) on such training.
Not quite the answer you sought I suspect, but more information is needed to provide a better answer.
Hope this helps.
Hershal