IEC 60812-2018 pdf free download – Failure modes and effects analysis (FMEA and FMECA).
This document explains how failure modes and effects analysis(FMEA)，including the failuremodes,effects and criticality analysis(FMECA) variant, is planned, performed,documentedand maintained.
The purpose of failure modes and effects analysis (FMEA) is to establish how items orprocesses might fail to perform their function so that any required treatments could beidentified.An FMEA provides a systematic method for identifying modes of failure togetherwith their effects on the item or process, both locally and globally. lt may also includeidentifying the causes of failure modes.Failure modes can be prioritized to support decisionsabout treatment. Where the ranking of criticality involves at least the severity ofconsequences，and often other measures of importance，the analysis is known as failuremodes, effects and criticality analysis (FMECA).
This document is applicable to hardware,software，processes including human action, andtheir interfaces, in any combination.
An FMEA can be used in a safety analysis, for regulatory and other purposes, but this being ageneric standard, does not give specific guidance for safety applications.
Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document.For dated references,only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
IEC 60050-192,International electrotechnical vocabulary – Part 192: Dependability (availableat http://www.electropedia.org)
3 Terms, definitions and abbreviated terms
3.1Terms and definitions
For the purpose of this document, the terms and definitions given in lIEC 60050-192 and thefollowing apply.
Iso and lEC maintain terminological databases for use in standardization at the followingaddresses:
.IEC Electropedia: available at http://www.electropedia.org/
. Iso Online browsing platform: available at http://www.iso.orglobp
3.1.1
failure mode
DEPRECATED: fault modemanner in which failure occurs
Note 1 to entry: A failure mode may be determined by the function lost or other state transition that occurred.
Note 2 to entry: Examples of hardware failure modes might be for a valve, “does not open , or for an engine,”does not start”.
Note 3 to entry: A human failure mode is determined by the function lost as a result of human action, whethercommitted or omitted.
[SOURCE: IEC 60050-192:2015,192-03-17，modified — Note 1 has been modified，Note 2and Note 3 have been added.]
3.1.2
failure effect
consequence of a failure, within or beyond the boundary of the failed item
Note 1 to entry: For some analyses, it may be necessary to consider individual failure modes and their effects.
Note 2 to entry: Failure effect also covers the consequence of a failure，within or beyond the boundary of thefailed process.
[SOURCE: IEC 60050-192:2015,192-O3-08, modified —Note 2 has been added.]
3.1.3
system
combination of interacting elements organized to achieve one or more stated purposes
Note 1 to entry: A system is sometimes considered as a product or as the services it provides.
Note 2 to entry: ln practice, the interpretation of its meaning is frequently clarified by the use of an associativenoun,e.g., aircraft system. Alternatively, the word “system” is substituted simply by a context-dependent synonym,e.g., aircraft,though this potentially obscures a system principles perspective.
[SOURCE: ISO/IEC/IEEE 15288:2015,4.1.46,modified — Note 3 has been deleted.J
3.1.4
item
subject being considered
Note 1 to entry: The item may be an individual part, component, device, functional unit, equipment, subsystem, orsystem.
Note 2 to entry: The item may consist of hardware,software,people or any combination thereof.Note 3 to entry: The item is often comprised of elements that may each be individually considered.
Note 4 to entry: IEC 60050-191:1990(now withdrawn; replaced by IEC 60050-192:2015) identified the term “entity’as an English synonym, which is not true for all applications.
Note 5 to entry: The definition for item in IEC 60050-191:1990(now withdrawn; replaced by lEC 60050-192:2015)is a description rather than a definition. This new definition provides meaningful substitution throughout thisdocument.The words of the former definition form new note 1.
[SOuRCE: IEC 60050-192:2015,192-01-01]
3.1.5
process
set of interrelated or interacting activities that transforms inputs into outputs
[SoURCE: IEC 60050-192:2015,192-01-08]IEC 60812 pdf download.