typical FMECA analysis has nine logical steps: 1) System definition, 2)
Identification of the failure modes, 3) Failure effects and causes analysis, 4)
Failure effects classification based on the severity, 5) Criticality
calculation, 6) Rank failure mode’s criticality, 7) Definition of the
occurrence and detection levels of a failure mode, 8) Computation of the RPN to
measure the risks of each of the failure modes and 9) Presentation of the
analysis’ results in heat matrixes for the user convenience. The FMECA analysis
(quantitative and/or qualitative) is usually performed in a part or a system level
while a combination of these two is possible by creating the analysis tree.
Within, the root is defined as the whole system while the branches are the
sub-system and the leaves on the tree, where the first failure modes are
defined, are the parts.
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