Failure mode and impact analysis
Failure mode and effect analysis is "potential failure mode and consequence analysis", or FMEA for short. FMEA is in the product design stage and process design stage, to analyze the sub-systems and parts that constitute the product, and to analyze each process of the constituent process one by one, find all potential failure modes, and analyze their possible consequences, so as to take the necessary Measures to improve the quality and reliability of a product is a systematic activity.
FMEA is divided into DFMEA/PFMEA and FMEA-MSR.
Chinese name
Failure mode and consequence analysis
Foreign name
Failure Mode and Effects Analysis
First appeared
1950 Aircraft Master Control System-Grumman Company
Abbreviation
FMEA
table of Contents
Failure mode and impact analysis
concept
Potential failure mode and effects analysis (failure mode and effects analysis, abbreviated as FMEA), is "preventive measures" and "from bottom to top."
Keywords: Potential-Failure has not yet occurred, it may happen, but not necessarily.
The "core" is focused on: prevention-dealing with anticipated failures, their causes and consequences/effects.
Main work: Risk assessment-the consequences of potential failure modes.
FMEA starts before product design and manufacturing process development activities, and guides the implementation throughout the entire product cycle.
It is an inductive analysis method that analyzes all possible failure modes of each product in the system and all possible effects on the system, and classifies each failure mode according to the severity, detection difficulty, and frequency of occurrence.
purpose
·Able to modify the product or process easily and at low cost, thereby reducing the modification of the post-crisis.
·Find measures to avoid or reduce the occurrence of these potential failures;
benefit
·Point out the weakness of reliability in design and propose countermeasures
·According to required specifications, environmental conditions, etc., use experimental design or simulation analysis to improve improper design in real time to save unnecessary losses
·Effective implementation of FMEA can shorten development time and cost
·In the early stage of FMEA development, design technology was considered, but in the later development, in addition to the use of design time, manufacturing engineering and inspection engineering can also be applied
·Improve product quality, reliability and safety