PBM Inc Génie-conseil Maintenance Préventive Entretien Équipements
Produits Services Approche Bénéfices
Mode et mécanisme de défaillance


Mode de défaillance

Failure mode is the manner whereby the failure is observed. Generally, it describes the way in which the failure happens and its impact on equipment operation.

Failure modes must be determined according to the different component performance standards as identified by the schemas and block diagrams. The individual failure modes for each component are postulated according to the formulated performance demands of the system description and the potential failure definitions included in the ground rules. Since it is possible to have several causes for the same failure mode, all the probable and independent causes for each failure mode must be identified and described.

Depending on how one looks at it, a failure mode could also cause the failure of another element of the system.
A hierarchy exists between the different modes of failure.

Failure mechanism

Physical, chemical or other processes that lead to failure.

«To assist you in prioritizing your improvement efforts, we help you identify the different failure modes and mechanisms and elaborate the hierarchical structures between the failure modes.»

ATTENTION :

It is necessary to distinguish between failure modes and failure mechanisms. Wear and fatigue are not failure modes, they are failure mechanisms.




© 2004 PBM, Inc. All rights reserved. Contact-us    Site map    Our booklet PDF    Links