AS NZS IEC-62676-3-2020 pdf download.Failure modes and efects analysis (FMEA and FMECA).
This document explains how failure modes and effects analysis (FMEA), including the failure modes, effects and criticality analysis (FMECA) variant, is planned, performed, documented and maintained. The purpose of failure modes and effects analysis (FMEA) is to establish how items or processes might fail to perform their function so that any required treatments could be identified. An FMEA provides a systematic method for identifying modes of failure together with their effects on the item or process, both locally and globally. It may also include identifying the causes of failure modes. Failure modes can be prioritized to support decisions about treatment. Where the ranking of criticality involves at least the severity of consequences, and often other measures of importance, the analysis is known as failure modes, effects and criticality analysis (FMECA). This document is applicable to hardware, software, processes including human action, and their interfaces, in any combination. An FMEA can be used in a safety analysis, for regulatory and other purposes, but this being a generic standard, does not give specific guidance for safety applications.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-1 92, International electrotechnical vocabulary – Part 192: Dependability (available at http://www.electropedia.org) 3 Terms, definitions and abbreviated terms
3.1 Terms and definitions For the purpose of this document, the terms and definitions given in IEC 60050-1 92 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1 failure mode DEPRECATED: fault mode manner 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, whether committed or omitted.
[SOURCE: IEC 60050-1 92:201 5, 1 92-03-1 7, modified — Note 1 has been modified, Note 2 and 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 the failed process.
[SOURCE: IEC 60050-1 92:201 5, 1 92-03-08, 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.AS NZS IEC-62676-3 pdf download.