AS IEC 60812:2008 pdf free download

AS IEC 60812:2008 pdf free download

AS IEC 60812:2008 pdf free download Analysis techniques for system reliability—Procedure for failure mode and effects analysis (FMEA)
1 Scope
This International Standard describes Failure Mode and Effects Analysis (FMEA) and Failure Mode, Effects and Criticality Analysis (FMECA), and gives guidance as to how they may be applied to achieve various objectives by
− providing the procedural steps necessary to perform an analysis;
− identifying appropriate terms, assumptions, criticality measures, failure modes;
− defining basic principles;
− providing examples of the necessary worksheets or other tabular forms.
All the general qualitative considerations presented for FMEA will apply to FMECA, since the latter is an extension of the other.
2 Normative references
The following referenced documents are indispensable for the application 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.
References to international standards that are struck through in this clause are replaced by references to Australian or Australian/New Zealand Standards that are listed immediately thereafter and identified by shading. Any Australian or Australian/New Zealand Standard that is identical to the International Standard it replaces is identified as such.
3 Terms and definitions
For the purposes of this document, the following definitions apply.
any part, component, device, subsystem, functional unit, equipment or system that can be individually considered
NOTE 1 An item may consist of hardware, software or both, and may also in particular cases include people.
NOTE 2 A number of items, e.g. a population of items or a sample, may itself be considered as an item.
[IEV 1 91 -01 -01 ]
A process can also be defined as an item which carries out a predetermined function and for which a process FMEA or FMECA is carried out. Normally, a hardware FMEA does not address people and their interactions with hardware/software, while a process FMEA normally includes actions of people.
termination of the ability of an item to perform a required function
[IEV 1 91 -04-01 ]
state of an item characterized by the inability to perform a required function, excluding the inability during preventive maintenance or other planned actions, or due to lack of external resources
NOTE 1 A fault is often the result of a failure of the item itself, but may exist without prior failure.
[IEV 1 91 -05-01 ]
NOTE 2 In this document “fault” is used interchangeably with the term “failure” for historical reasons.
failure effect
consequence of a failure mode in terms of the operation, function or status of the item
failure mode
manner in which an item fails
failure criticality
combination of the severity of an effect and the frequency of its occurrence or other attributes of a failure as a measure of the need for addressing and mitigation
set of interrelated or interacting elements
NOTE 1 In the context of dependability, a system will have
a) defined purposes expressed in terms of required functions;
b) stated conditions of operation use (see 1 91 -01 -1 2);
c) a defined boundary.
NOTE 2 The structure of a system is hierarchical.
[ISO 9000:2000]